diff --git a/keyserver/addons/rust-node-addon/Cargo.lock b/keyserver/addons/rust-node-addon/Cargo.lock
index 7045a3582..5a75c8fb1 100644
--- a/keyserver/addons/rust-node-addon/Cargo.lock
+++ b/keyserver/addons/rust-node-addon/Cargo.lock
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 checksum = "3fdd6f064ccff2d6567adcb3873ca630700f00b5ad3f060c25b5dcfd9a4ce152"
 dependencies = [
  "cfg-if",
  "once_cell",
 ]
 
 [[package]]
 name = "tokio"
 version = "1.25.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c8e00990ebabbe4c14c08aca901caed183ecd5c09562a12c824bb53d3c3fd3af"
 dependencies = [
  "autocfg",
  "bytes",
  "libc",
  "memchr",
  "mio",
  "num_cpus",
  "pin-project-lite",
  "socket2",
  "tokio-macros",
  "windows-sys 0.42.0",
 ]
 
 [[package]]
 name = "tokio-io-timeout"
 version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "30b74022ada614a1b4834de765f9bb43877f910cc8ce4be40e89042c9223a8bf"
 dependencies = [
  "pin-project-lite",
  "tokio",
 ]
 
 [[package]]
 name = "tokio-macros"
 version = "1.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d266c00fde287f55d3f1c3e96c500c362a2b8c695076ec180f27918820bc6df8"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.107",
 ]
 
 [[package]]
 name = "tokio-stream"
 version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8fb52b74f05dbf495a8fba459fdc331812b96aa086d9eb78101fa0d4569c3313"
 dependencies = [
  "futures-core",
  "pin-project-lite",
  "tokio",
 ]
 
 [[package]]
 name = "tokio-util"
 version = "0.7.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5427d89453009325de0d8f342c9490009f76e999cb7672d77e46267448f7e6b2"
 dependencies = [
  "bytes",
  "futures-core",
  "futures-sink",
  "pin-project-lite",
  "tokio",
  "tracing",
 ]
 
 [[package]]
 name = "tonic"
-version = "0.8.3"
+version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f219fad3b929bef19b1f86fbc0358d35daed8f2cac972037ac0dc10bbb8d5fb"
+checksum = "3082666a3a6433f7f511c7192923fa1fe07c69332d3c6a2e6bb040b569199d5a"
 dependencies = [
- "async-stream",
  "async-trait",
  "axum",
  "base64",
  "bytes",
  "futures-core",
  "futures-util",
  "h2",
  "http",
  "http-body",
  "hyper",
  "hyper-timeout",
  "percent-encoding",
  "pin-project",
  "prost",
- "prost-derive",
  "tokio",
  "tokio-stream",
- "tokio-util",
  "tower",
  "tower-layer",
  "tower-service",
  "tracing",
- "tracing-futures",
 ]
 
 [[package]]
 name = "tonic-build"
-version = "0.8.4"
+version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5bf5e9b9c0f7e0a7c027dcfaba7b2c60816c7049171f679d99ee2ff65d0de8c4"
+checksum = "a6fdaae4c2c638bb70fe42803a26fbd6fc6ac8c72f5c59f67ecc2a2dcabf4b07"
 dependencies = [
  "prettyplease",
  "proc-macro2",
  "prost-build",
  "quote",
- "syn",
+ "syn 1.0.107",
 ]
 
 [[package]]
 name = "tower"
 version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8fa9be0de6cf49e536ce1851f987bd21a43b771b09473c3549a6c853db37c1c"
 dependencies = [
  "futures-core",
  "futures-util",
  "indexmap",
  "pin-project",
  "pin-project-lite",
  "rand",
  "slab",
  "tokio",
  "tokio-util",
  "tower-layer",
  "tower-service",
  "tracing",
 ]
 
-[[package]]
-name = "tower-http"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f873044bf02dd1e8239e9c1293ea39dad76dc594ec16185d0a1bf31d8dc8d858"
-dependencies = [
- "bitflags",
- "bytes",
- "futures-core",
- "futures-util",
- "http",
- "http-body",
- "http-range-header",
- "pin-project-lite",
- "tower",
- "tower-layer",
- "tower-service",
-]
-
 [[package]]
 name = "tower-layer"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c20c8dbed6283a09604c3e69b4b7eeb54e298b8a600d4d5ecb5ad39de609f1d0"
 
 [[package]]
 name = "tower-service"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6bc1c9ce2b5135ac7f93c72918fc37feb872bdc6a5533a8b85eb4b86bfdae52"
 
 [[package]]
 name = "tracing"
 version = "0.1.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ce8c33a8d48bd45d624a6e523445fd21ec13d3653cd51f681abf67418f54eb8"
 dependencies = [
  "cfg-if",
- "log",
  "pin-project-lite",
  "tracing-attributes",
  "tracing-core",
 ]
 
 [[package]]
 name = "tracing-attributes"
 version = "0.1.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4017f8f45139870ca7e672686113917c71c7a6e02d4924eda67186083c03081a"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.107",
 ]
 
 [[package]]
 name = "tracing-core"
 version = "0.1.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24eb03ba0eab1fd845050058ce5e616558e8f8d8fca633e6b163fe25c797213a"
 dependencies = [
  "once_cell",
 ]
 
-[[package]]
-name = "tracing-futures"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
-dependencies = [
- "pin-project",
- "tracing",
-]
-
 [[package]]
 name = "try-lock"
 version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3528ecfd12c466c6f163363caf2d02a71161dd5e1cc6ae7b34207ea2d42d81ed"
 
 [[package]]
 name = "typenum"
 version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "497961ef93d974e23eb6f433eb5fe1b7930b659f06d12dec6fc44a8f554c0bba"
 
 [[package]]
 name = "unicode-ident"
 version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "84a22b9f218b40614adcb3f4ff08b703773ad44fa9423e4e0d346d5db86e4ebc"
 
 [[package]]
 name = "unicode-segmentation"
 version = "1.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1dd624098567895118886609431a7c3b8f516e41d30e0643f03d94592a147e36"
 
 [[package]]
 name = "unicode-xid"
 version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f962df74c8c05a667b5ee8bcf162993134c104e96440b663c8daa176dc772d8c"
 
 [[package]]
 name = "version_check"
 version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
 [[package]]
 name = "voprf"
 version = "0.4.0-pre.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "081acbe8fcf05d5e8e2aad8ef3d40e02eddeaec07c75a9770d862a0fc0874322"
 dependencies = [
  "curve25519-dalek 4.0.0-pre.1",
  "derive-where",
  "digest 0.10.6",
  "displaydoc",
  "elliptic-curve",
  "generic-array",
  "rand_core 0.6.4",
  "serde",
  "sha2 0.10.6",
  "subtle",
  "zeroize",
 ]
 
 [[package]]
 name = "want"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ce8a968cb1cd110d136ff8b819a556d6fb6d919363c61534f6860c7eb172ba0"
 dependencies = [
  "log",
  "try-lock",
 ]
 
 [[package]]
 name = "wasi"
 version = "0.9.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "31f8dcbc21f30d9b8f2ea926ecb58f6b91192c17e9d33594b3df58b2007ca53b"
 dependencies = [
  "cfg-if",
  "wasm-bindgen-macro",
 ]
 
 [[package]]
 name = "wasm-bindgen-backend"
 version = "0.2.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95ce90fd5bcc06af55a641a86428ee4229e44e07033963a2290a8e241607ccb9"
 dependencies = [
  "bumpalo",
  "log",
  "once_cell",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.107",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-macro"
 version = "0.2.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4c21f77c0bedc37fd5dc21f897894a5ca01e7bb159884559461862ae90c0b4c5"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
 ]
 
 [[package]]
 name = "wasm-bindgen-macro-support"
 version = "0.2.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2aff81306fcac3c7515ad4e177f521b5c9a15f2b08f4e32d823066102f35a5f6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.107",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
 version = "0.2.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0046fef7e28c3804e5e38bfa31ea2a0f73905319b677e57ebe37e49358989b5d"
 
 [[package]]
 name = "which"
 version = "4.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2441c784c52b289a054b7201fc93253e288f094e2f4be9058343127c4226a269"
 dependencies = [
  "either",
  "libc",
  "once_cell",
 ]
 
 [[package]]
 name = "winapi"
 version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
 dependencies = [
  "winapi-i686-pc-windows-gnu",
  "winapi-x86_64-pc-windows-gnu",
 ]
 
 [[package]]
 name = "winapi-i686-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
 name = "windows-sys"
 version = "0.42.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7"
 dependencies = [
  "windows_aarch64_gnullvm",
  "windows_aarch64_msvc",
  "windows_i686_gnu",
  "windows_i686_msvc",
  "windows_x86_64_gnu",
  "windows_x86_64_gnullvm",
  "windows_x86_64_msvc",
 ]
 
 [[package]]
 name = "windows-sys"
 version = "0.45.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
 dependencies = [
  "windows-targets",
 ]
 
 [[package]]
 name = "windows-targets"
 version = "0.42.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e2522491fbfcd58cc84d47aeb2958948c4b8982e9a2d8a2a35bbaed431390e7"
 dependencies = [
  "windows_aarch64_gnullvm",
  "windows_aarch64_msvc",
  "windows_i686_gnu",
  "windows_i686_msvc",
  "windows_x86_64_gnu",
  "windows_x86_64_gnullvm",
  "windows_x86_64_msvc",
 ]
 
 [[package]]
 name = "windows_aarch64_gnullvm"
 version = "0.42.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8c9864e83243fdec7fc9c5444389dcbbfd258f745e7853198f365e3c4968a608"
 
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.42.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4c8b1b673ffc16c47a9ff48570a9d85e25d265735c503681332589af6253c6c7"
 
 [[package]]
 name = "windows_i686_gnu"
 version = "0.42.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "de3887528ad530ba7bdbb1faa8275ec7a1155a45ffa57c37993960277145d640"
 
 [[package]]
 name = "windows_i686_msvc"
 version = "0.42.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bf4d1122317eddd6ff351aa852118a2418ad4214e6613a50e0191f7004372605"
 
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.42.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c1040f221285e17ebccbc2591ffdc2d44ee1f9186324dd3e84e99ac68d699c45"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.42.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "628bfdf232daa22b0d64fdb62b09fcc36bb01f05a3939e20ab73aaf9470d0463"
 
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.42.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "447660ad36a13288b1db4d4248e857b510e8c3a225c822ba4fb748c0aafecffd"
 
 [[package]]
 name = "zeroize"
 version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a0956f1ba7c7909bfb66c2e9e4124ab6f6482560f6628b5aaeba39207c9aad9"
 dependencies = [
  "zeroize_derive",
 ]
 
 [[package]]
 name = "zeroize_derive"
 version = "1.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "44bf07cb3e50ea2003396695d58bf46bc9887a1f362260446fad6bc4e79bd36c"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.107",
  "synstructure",
 ]
diff --git a/keyserver/addons/rust-node-addon/Cargo.toml b/keyserver/addons/rust-node-addon/Cargo.toml
index 82833e47b..0b9ee3cf8 100644
--- a/keyserver/addons/rust-node-addon/Cargo.toml
+++ b/keyserver/addons/rust-node-addon/Cargo.toml
@@ -1,35 +1,35 @@
 [package]
 edition = "2021"
 name = "rust-node-addon"
 version = "0.1.0"
 license = "BSD-3-Clause"
 
 [lib]
 crate-type = ["cdylib"]
 
 [dependencies]
 # Default enable napi4 feature, see https://nodejs.org/api/n-api.html#node-api-version-matrix
 napi = { version = "2.10.1", default-features = false, features = [
   "napi4",
   "tokio_rt",
 ] }
 napi-derive = { version = "2.9.1", default-features = false }
 opaque-ke = "1.2"
 rand = "0.8"
-tonic = "0.8"
+tonic = "0.9.1"
 tokio = { version = "1.0", features = ["macros", "rt-multi-thread"] }
 tokio-stream = "0.1"
 tracing = "0.1"
 prost = "0.11"
 comm-opaque = {path = "../../../shared/comm-opaque"}
 comm-opaque2 = {path = "../../../shared/comm-opaque2"}
 lazy_static = "1.4"
 serde_json = "1.0"
 serde = { version = "1.0", features = ["derive"] }
 
 [build-dependencies]
 napi-build = "2.0.1"
-tonic-build = "0.8"
+tonic-build = "0.9.1"
 
 [profile.release]
 lto = true
diff --git a/native/native_rust_library/Cargo.lock b/native/native_rust_library/Cargo.lock
index e7fa02972..d8f8b685f 100644
--- a/native/native_rust_library/Cargo.lock
+++ b/native/native_rust_library/Cargo.lock
@@ -1,1707 +1,1664 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 version = 3
 
 [[package]]
 name = "aho-corasick"
 version = "0.7.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4f55bd91a0978cbfd91c457a164bab8b4001c833b7f323132c0a4e1922dd44e"
 dependencies = [
  "memchr",
 ]
 
 [[package]]
 name = "anyhow"
 version = "1.0.65"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "98161a4e3e2184da77bb14f02184cdd111e83bbbcc9979dfee3c44b9a85f5602"
 
 [[package]]
 name = "argon2"
 version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "db4ce4441f99dbd377ca8a8f57b698c44d0d6e712d8329b5040da5a64aa1ce73"
 dependencies = [
  "base64ct",
  "blake2",
  "password-hash",
 ]
 
-[[package]]
-name = "async-stream"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dad5c83079eae9969be7fadefe640a1c566901f05ff91ab221de4b6f68d9507e"
-dependencies = [
- "async-stream-impl",
- "futures-core",
-]
-
-[[package]]
-name = "async-stream-impl"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10f203db73a71dfa2fb6dd22763990fa26f3d2625a6da2da900d23b87d26be27"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "async-trait"
-version = "0.1.57"
+version = "0.1.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76464446b8bc32758d7e88ee1a804d9914cd9b1cb264c029899680b0be29826f"
+checksum = "b9ccdd8f2a161be9bd5c023df56f1b2a0bd1d83872ae53b71a84a12c9bf6e842"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.15",
 ]
 
 [[package]]
 name = "autocfg"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
 [[package]]
 name = "axum"
-version = "0.5.16"
+version = "0.6.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9e3356844c4d6a6d6467b8da2cffb4a2820be256f50a3a386c9d152bab31043"
+checksum = "113713495a32dd0ab52baf5c10044725aa3aec00b31beda84218e469029b72a3"
 dependencies = [
  "async-trait",
  "axum-core",
  "bitflags",
  "bytes",
  "futures-util",
  "http",
  "http-body",
  "hyper",
  "itoa",
  "matchit",
  "memchr",
  "mime",
  "percent-encoding",
  "pin-project-lite",
+ "rustversion",
  "serde",
  "sync_wrapper",
- "tokio",
  "tower",
- "tower-http",
  "tower-layer",
  "tower-service",
 ]
 
 [[package]]
 name = "axum-core"
-version = "0.2.8"
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  "tokio",
  "tokio-util",
  "tower-layer",
  "tower-service",
  "tracing",
 ]
 
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-name = "tower-http"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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- "bytes",
- "futures-core",
- "futures-util",
- "http",
- "http-body",
- "http-range-header",
- "pin-project-lite",
- "tower",
- "tower-layer",
- "tower-service",
-]
-
 [[package]]
 name = "tower-layer"
-version = "0.3.1"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "343bc9466d3fe6b0f960ef45960509f84480bf4fd96f92901afe7ff3df9d3a62"
+checksum = "c20c8dbed6283a09604c3e69b4b7eeb54e298b8a600d4d5ecb5ad39de609f1d0"
 
 [[package]]
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 [[package]]
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 dependencies = [
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- "log",
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  "tracing-attributes",
  "tracing-core",
 ]
 
 [[package]]
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 dependencies = [
  "proc-macro2",
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- "syn",
+ "syn 1.0.99",
 ]
 
 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5aeea4303076558a00714b823f9ad67d58a3bbda1df83d8827d21193156e22f7"
 dependencies = [
  "once_cell",
 ]
 
-[[package]]
-name = "tracing-futures"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
-dependencies = [
- "pin-project",
- "tracing",
-]
-
 [[package]]
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 checksum = "59547bce71d9c38b83d9c0e92b6066c4253371f15005def0c30d9657f50c7642"
 
 [[package]]
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 [[package]]
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 checksum = "f962df74c8c05a667b5ee8bcf162993134c104e96440b663c8daa176dc772d8c"
 
 [[package]]
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  "digest 0.10.5",
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  "rand_core 0.6.4",
  "serde",
  "sha2",
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 ]
 
 [[package]]
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 ]
 
 [[package]]
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 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
 [[package]]
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 dependencies = [
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  "wasm-bindgen-macro",
 ]
 
 [[package]]
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 checksum = "95ce90fd5bcc06af55a641a86428ee4229e44e07033963a2290a8e241607ccb9"
 dependencies = [
  "bumpalo",
  "log",
  "once_cell",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.99",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-macro"
 version = "0.2.84"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4c21f77c0bedc37fd5dc21f897894a5ca01e7bb159884559461862ae90c0b4c5"
 dependencies = [
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  "wasm-bindgen-macro-support",
 ]
 
 [[package]]
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 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.99",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
 version = "0.2.84"
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 checksum = "0046fef7e28c3804e5e38bfa31ea2a0f73905319b677e57ebe37e49358989b5d"
 
 [[package]]
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 ]
 
 [[package]]
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 ]
 
 [[package]]
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 ]
 
 [[package]]
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  "windows_i686_gnu 0.36.1",
  "windows_i686_msvc 0.36.1",
  "windows_x86_64_gnu 0.36.1",
  "windows_x86_64_msvc 0.36.1",
 ]
 
 [[package]]
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  "windows_aarch64_msvc 0.42.1",
  "windows_i686_gnu 0.42.1",
  "windows_i686_msvc 0.42.1",
  "windows_x86_64_gnu 0.42.1",
  "windows_x86_64_gnullvm",
  "windows_x86_64_msvc 0.42.1",
 ]
 
 [[package]]
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 checksum = "8c9864e83243fdec7fc9c5444389dcbbfd258f745e7853198f365e3c4968a608"
 
 [[package]]
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 checksum = "9bb8c3fd39ade2d67e9874ac4f3db21f0d710bee00fe7cab16949ec184eeaa47"
 
 [[package]]
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 checksum = "4c8b1b673ffc16c47a9ff48570a9d85e25d265735c503681332589af6253c6c7"
 
 [[package]]
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 checksum = "180e6ccf01daf4c426b846dfc66db1fc518f074baa793aa7d9b9aaeffad6a3b6"
 
 [[package]]
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 checksum = "de3887528ad530ba7bdbb1faa8275ec7a1155a45ffa57c37993960277145d640"
 
 [[package]]
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 checksum = "e2e7917148b2812d1eeafaeb22a97e4813dfa60a3f8f78ebe204bcc88f12f024"
 
 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bf4d1122317eddd6ff351aa852118a2418ad4214e6613a50e0191f7004372605"
 
 [[package]]
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 checksum = "4dcd171b8776c41b97521e5da127a2d86ad280114807d0b2ab1e462bc764d9e1"
 
 [[package]]
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 checksum = "c1040f221285e17ebccbc2591ffdc2d44ee1f9186324dd3e84e99ac68d699c45"
 
 [[package]]
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 checksum = "628bfdf232daa22b0d64fdb62b09fcc36bb01f05a3939e20ab73aaf9470d0463"
 
 [[package]]
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 checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"
 
 [[package]]
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 checksum = "447660ad36a13288b1db4d4248e857b510e8c3a225c822ba4fb748c0aafecffd"
 
 [[package]]
 name = "zeroize"
 version = "1.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c394b5bd0c6f669e7275d9c20aa90ae064cb22e75a1cad54e1b34088034b149f"
 dependencies = [
  "zeroize_derive",
 ]
 
 [[package]]
 name = "zeroize_derive"
 version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f8f187641dad4f680d25c4bfc4225b418165984179f26ca76ec4fb6441d3a17"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.99",
  "synstructure",
 ]
diff --git a/native/native_rust_library/Cargo.toml b/native/native_rust_library/Cargo.toml
index 719883232..9fad631c6 100644
--- a/native/native_rust_library/Cargo.toml
+++ b/native/native_rust_library/Cargo.toml
@@ -1,28 +1,28 @@
 [package]
 name = "native_rust_library"
 version = "0.1.0"
 edition = "2021"
 license = "BSD-3-Clause"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
 cxx = "1.0"
 tokio = { version = "1.24", features = ["macros", "rt-multi-thread"] }
 tokio-stream = "0.1"
-tonic = "0.8"
+tonic = "0.9.1"
 prost = "0.11"
 lazy_static = "1.4"
 rand = "0.8"
 opaque-ke = "1.2"
 tracing = "0.1"
 regex = "1.6"
 comm-opaque2 = {path = "../../shared/comm-opaque2"}
 derive_more = "0.99"
 
 [build-dependencies]
 cxx-build = "1.0"
-tonic-build = "0.8"
+tonic-build = "0.9.1"
 
 [lib]
 crate-type = ["staticlib"]
diff --git a/services/identity/Cargo.lock b/services/identity/Cargo.lock
index f14b4333a..f49c7293b 100644
--- a/services/identity/Cargo.lock
+++ b/services/identity/Cargo.lock
@@ -1,2966 +1,3299 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 version = 3
 
 [[package]]
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 checksum = "cc936419f96fa211c1b9166887b38e5e40b19958e5b895be7c1f93adec7071ac"
 dependencies = [
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 [[package]]
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 checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
 dependencies = [
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 [[package]]
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 checksum = "7de8ce5e0f9f8d88245311066a578d72b7af3e7088f32783804676302df237e4"
 
 [[package]]
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 checksum = "db4ce4441f99dbd377ca8a8f57b698c44d0d6e712d8329b5040da5a64aa1ce73"
 dependencies = [
  "base64ct",
  "blake2",
  "password-hash",
 ]
 
 [[package]]
-name = "async-stream"
-version = "0.3.5"
+name = "async-io"
+version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd56dd203fef61ac097dd65721a419ddccb106b2d2b70ba60a6b529f03961a51"
+checksum = "0fc5b45d93ef0529756f812ca52e44c221b35341892d3dcc34132ac02f3dd2af"
 dependencies = [
- "async-stream-impl",
- "futures-core",
- "pin-project-lite",
+ "async-lock",
+ "autocfg",
+ "cfg-if",
+ "concurrent-queue",
+ "futures-lite",
+ "log",
+ "parking",
+ "polling",
+ "rustix",
+ "slab",
+ "socket2",
+ "waker-fn",
 ]
 
 [[package]]
-name = "async-stream-impl"
-version = "0.3.5"
+name = "async-lock"
+version = "2.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "16e62a023e7c117e27523144c5d2459f4397fcc3cab0085af8e2224f643a0193"
+checksum = "fa24f727524730b077666307f2734b4a1a1c57acb79193127dcc8914d5242dd7"
 dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.13",
+ "event-listener",
 ]
 
 [[package]]
 name = "async-trait"
 version = "0.1.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9ccdd8f2a161be9bd5c023df56f1b2a0bd1d83872ae53b71a84a12c9bf6e842"
 dependencies = [
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  "syn 2.0.13",
 ]
 
 [[package]]
 name = "atty"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
 dependencies = [
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 [[package]]
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 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
 [[package]]
 name = "aws-config"
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 checksum = "3c3d1e2a1f1ab3ac6c4b884e37413eaa03eb9d901e4fc68ee8f5c1d49721680e"
 dependencies = [
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  "aws-http",
  "aws-sdk-sso",
  "aws-sdk-sts",
  "aws-smithy-async",
  "aws-smithy-client",
  "aws-smithy-http",
  "aws-smithy-http-tower",
  "aws-smithy-json",
  "aws-smithy-types",
  "aws-types",
  "bytes",
  "hex",
  "http",
  "hyper",
  "ring",
  "time 0.3.20",
  "tokio",
  "tower",
  "tracing",
  "zeroize",
 ]
 
 [[package]]
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 version = "0.54.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bb0696a0523a39a19087747e4dafda0362dc867531e3d72a3f195564c84e5e08"
 dependencies = [
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  "tokio",
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 ]
 
 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "80a4f935ab6a1919fbfd6102a80c4fccd9ff5f47f94ba154074afe1051903261"
 dependencies = [
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  "aws-types",
  "http",
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 ]
 
 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "82976ca4e426ee9ca3ffcf919d9b2c8d14d0cd80d43cc02173737a8f07f28d4d"
 dependencies = [
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  "aws-types",
  "bytes",
  "http",
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  "lazy_static",
  "percent-encoding",
  "pin-project-lite",
  "tracing",
 ]
 
 [[package]]
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 version = "0.24.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "34fc8efd8ed65312b05dc84bb0d7ba79c31802873c4b5676403e220724af39b7"
 dependencies = [
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  "aws-http",
  "aws-sig-auth",
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  "aws-smithy-client",
  "aws-smithy-http",
  "aws-smithy-http-tower",
  "aws-smithy-json",
  "aws-smithy-types",
  "aws-types",
  "bytes",
  "fastrand",
  "http",
  "regex",
  "tokio-stream",
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  "tracing",
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 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ca0119bacf0c42f587506769390983223ba834e605f049babe514b2bd646dbb2"
 dependencies = [
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  "aws-endpoint",
  "aws-http",
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  "windows_i686_gnu 0.42.2",
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  "windows_i686_gnu 0.42.2",
  "windows_i686_msvc 0.42.2",
  "windows_x86_64_gnu 0.42.2",
  "windows_x86_64_gnullvm 0.42.2",
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  "windows_aarch64_msvc 0.48.0",
  "windows_i686_gnu 0.48.0",
  "windows_i686_msvc 0.48.0",
  "windows_x86_64_gnu 0.48.0",
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 [[package]]
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 [[package]]
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 [[package]]
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 checksum = "26d41b46a36d453748aedef1486d5c7a85db22e56aff34643984ea85514e94a3"
 
 [[package]]
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 checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
 
 [[package]]
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 checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
 
 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
 
 [[package]]
 name = "xmlparser"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4d25c75bf9ea12c4040a97f829154768bbbce366287e2dc044af160cd79a13fd"
 
 [[package]]
 name = "zeroize"
 version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a0956f1ba7c7909bfb66c2e9e4124ab6f6482560f6628b5aaeba39207c9aad9"
 dependencies = [
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 ]
 
 [[package]]
 name = "zeroize_derive"
 version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
 dependencies = [
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 ]
diff --git a/services/identity/Cargo.toml b/services/identity/Cargo.toml
index 91be5d975..76828b032 100644
--- a/services/identity/Cargo.toml
+++ b/services/identity/Cargo.toml
@@ -1,35 +1,37 @@
 [package]
 name = "identity"
 version = "0.1.0"
 edition = "2021"
 license = "BSD-3-Clause"
 
 [dependencies]
 tonic = "0.9.1"
 prost = "0.11"
 futures-core = "0.3"
 tokio = { version = "1.24", features = ["macros", "rt-multi-thread"] }
 tokio-stream = "0.1.9"
 opaque-ke = { version = "1.2.0", features = ["std"] }
 curve25519-dalek = "3"
 clap = { version = "3.1.12", features = ["derive"] }
 derive_more = "0.99"
 aws-config = "0.54.0"
 aws-sdk-dynamodb = "0.24.0"
 tracing = "0.1"
 tracing-subscriber = "0.3"
 chrono = "0.4.19"
 rand = "0.8"
 bytes = "1.1"
 constant_time_eq = "0.2.2"
 siwe = "0.3"
 comm-opaque = { path = "../../shared/comm-opaque" }
 comm-opaque2 = { path = "../../shared/comm-opaque2" }
 once_cell = "1.17"
 hex = "0.4"
 tonic-web = "0.9.1"
 serde = { version = "1.0.159", features = [ "derive" ] }
 serde_json = "1.0.95"
+moka = { version = "0.10", features = ["future"] }
+uuid = { version = "1.3", features = [ "v4" ] }
 
 [build-dependencies]
 tonic-build = "0.9.1"
diff --git a/services/identity/src/client_service.rs b/services/identity/src/client_service.rs
index bae2faefa..93d8f19f2 100644
--- a/services/identity/src/client_service.rs
+++ b/services/identity/src/client_service.rs
@@ -1,170 +1,270 @@
 pub mod client_proto {
   tonic::include_proto!("identity.client");
 }
 
+use std::str::FromStr;
+
 use crate::{
   client_service::client_proto::{
     DeleteUserRequest, Empty, GenerateNonceResponse, KeyserverKeysRequest,
     KeyserverKeysResponse, OpaqueLoginFinishRequest, OpaqueLoginFinishResponse,
     OpaqueLoginStartRequest, OpaqueLoginStartResponse,
     ReceiverKeysForUserRequest, ReceiverKeysForUserResponse,
     RefreshUserPreKeysRequest, RegistrationFinishRequest,
     RegistrationFinishResponse, RegistrationStartRequest,
     RegistrationStartResponse, SenderKeysForUserRequest,
     SenderKeysForUserResponse, UpdateUserPasswordFinishRequest,
     UpdateUserPasswordFinishResponse, UpdateUserPasswordStartRequest,
     UpdateUserPasswordStartResponse, UploadOneTimeKeysRequest,
     VerifyUserAccessTokenRequest, VerifyUserAccessTokenResponse,
     WalletLoginRequest, WalletLoginResponse,
   },
-  database::{DatabaseClient, Error as DBError},
+  config::CONFIG,
+  database::{DatabaseClient, Error as DBError, KeyPayload},
+  id::generate_uuid,
   nonce::generate_nonce_data,
 };
 use aws_sdk_dynamodb::Error as DynamoDBError;
 pub use client_proto::identity_client_service_server::{
   IdentityClientService, IdentityClientServiceServer,
 };
+use moka::future::Cache;
 use rand::rngs::OsRng;
 use tonic::Response;
 use tracing::error;
 
+#[derive(Clone)]
+pub enum WorkflowInProgress {
+  Registration(UserRegistrationInfo),
+}
+
+#[derive(Clone)]
+pub struct UserRegistrationInfo {
+  username: String,
+  device_id_key: String,
+  key_payload: String,
+  key_payload_signature: String,
+  identity_prekey: String,
+  identity_prekey_signature: String,
+  identity_onetime_keys: Vec<String>,
+  notif_prekey: String,
+  notif_prekey_signature: String,
+  notif_onetime_keys: Vec<String>,
+}
+
 #[derive(derive_more::Constructor)]
 pub struct ClientService {
   client: DatabaseClient,
+  cache: Cache<String, WorkflowInProgress>,
 }
 
 #[tonic::async_trait]
 impl IdentityClientService for ClientService {
   async fn register_password_user_start(
     &self,
-    _request: tonic::Request<RegistrationStartRequest>,
+    request: tonic::Request<RegistrationStartRequest>,
   ) -> Result<tonic::Response<RegistrationStartResponse>, tonic::Status> {
-    unimplemented!();
+    let message = request.into_inner();
+    let username_taken = self
+      .client
+      .username_taken(message.username.clone())
+      .await
+      .map_err(handle_db_error)?;
+
+    if username_taken {
+      return Err(tonic::Status::already_exists("username already exists"));
+    }
+
+    if CONFIG.reserved_usernames.contains(&message.username) {
+      return Err(tonic::Status::invalid_argument("username reserved"));
+    }
+
+    if let client_proto::RegistrationStartRequest {
+      opaque_registration_request: register_message,
+      username,
+      device_key_upload:
+        Some(client_proto::DeviceKeyUpload {
+          device_key_info:
+            Some(client_proto::IdentityKeyInfo {
+              payload,
+              payload_signature,
+              social_proof: _social_proof,
+            }),
+          identity_upload:
+            Some(client_proto::PreKey {
+              pre_key: identity_prekey,
+              pre_key_signature: identity_prekey_signature,
+            }),
+          notif_upload:
+            Some(client_proto::PreKey {
+              pre_key: notif_prekey,
+              pre_key_signature: notif_prekey_signature,
+            }),
+          onetime_identity_prekeys,
+          onetime_notif_prekeys,
+        }),
+    } = message
+    {
+      let server_registration = comm_opaque2::server::Registration::new();
+      let server_message = server_registration
+        .start(&CONFIG.server_setup, &register_message, username.as_bytes())
+        .map_err(comm_opaque2::grpc::protocol_error_to_grpc_status)?;
+      let key_info = KeyPayload::from_str(&payload)
+        .map_err(|_| tonic::Status::invalid_argument("malformed payload"))?;
+      let registration_state = UserRegistrationInfo {
+        username,
+        device_id_key: key_info.primary_identity_public_keys.curve25519,
+        key_payload: payload,
+        key_payload_signature: payload_signature,
+        identity_prekey,
+        identity_prekey_signature,
+        identity_onetime_keys: onetime_identity_prekeys,
+        notif_prekey,
+        notif_prekey_signature,
+        notif_onetime_keys: onetime_notif_prekeys,
+      };
+      let session_id = generate_uuid();
+      self
+        .cache
+        .insert(
+          session_id.clone(),
+          WorkflowInProgress::Registration(registration_state),
+        )
+        .await;
+
+      let response = RegistrationStartResponse {
+        session_id,
+        opaque_registration_response: server_message,
+      };
+      Ok(Response::new(response))
+    } else {
+      Err(tonic::Status::invalid_argument("unexpected message data"))
+    }
   }
 
   async fn register_password_user_finish(
     &self,
     _request: tonic::Request<RegistrationFinishRequest>,
   ) -> Result<tonic::Response<RegistrationFinishResponse>, tonic::Status> {
     unimplemented!();
   }
 
   async fn update_user_password_start(
     &self,
     _request: tonic::Request<UpdateUserPasswordStartRequest>,
   ) -> Result<tonic::Response<UpdateUserPasswordStartResponse>, tonic::Status>
   {
     unimplemented!();
   }
 
   async fn update_user_password_finish(
     &self,
     _request: tonic::Request<UpdateUserPasswordFinishRequest>,
   ) -> Result<tonic::Response<UpdateUserPasswordFinishResponse>, tonic::Status>
   {
     unimplemented!();
   }
 
   async fn login_password_user_start(
     &self,
     _request: tonic::Request<OpaqueLoginStartRequest>,
   ) -> Result<tonic::Response<OpaqueLoginStartResponse>, tonic::Status> {
     unimplemented!();
   }
 
   async fn login_password_user_finish(
     &self,
     _request: tonic::Request<OpaqueLoginFinishRequest>,
   ) -> Result<tonic::Response<OpaqueLoginFinishResponse>, tonic::Status> {
     unimplemented!();
   }
 
   async fn login_wallet_user(
     &self,
     _request: tonic::Request<WalletLoginRequest>,
   ) -> Result<tonic::Response<WalletLoginResponse>, tonic::Status> {
     unimplemented!();
   }
 
   async fn delete_user(
     &self,
     _request: tonic::Request<DeleteUserRequest>,
   ) -> Result<tonic::Response<Empty>, tonic::Status> {
     unimplemented!();
   }
 
   async fn generate_nonce(
     &self,
     _request: tonic::Request<Empty>,
   ) -> Result<tonic::Response<GenerateNonceResponse>, tonic::Status> {
     let nonce_data = generate_nonce_data(&mut OsRng);
     match self
       .client
       .add_nonce_to_nonces_table(nonce_data.clone())
       .await
     {
       Ok(_) => Ok(Response::new(GenerateNonceResponse {
         nonce: nonce_data.nonce,
       })),
       Err(e) => Err(handle_db_error(e)),
     }
   }
 
   async fn get_receiver_keys_for_user(
     &self,
     _request: tonic::Request<ReceiverKeysForUserRequest>,
   ) -> Result<tonic::Response<ReceiverKeysForUserResponse>, tonic::Status> {
     unimplemented!();
   }
 
   async fn get_sender_keys_for_user(
     &self,
     _request: tonic::Request<SenderKeysForUserRequest>,
   ) -> Result<tonic::Response<SenderKeysForUserResponse>, tonic::Status> {
     unimplemented!();
   }
 
   async fn get_keyserver_keys(
     &self,
     _request: tonic::Request<KeyserverKeysRequest>,
   ) -> Result<tonic::Response<KeyserverKeysResponse>, tonic::Status> {
     unimplemented!();
   }
 
   async fn upload_one_time_keys(
     &self,
     _request: tonic::Request<UploadOneTimeKeysRequest>,
   ) -> Result<tonic::Response<Empty>, tonic::Status> {
     unimplemented!();
   }
 
   async fn refresh_user_pre_keys(
     &self,
     _request: tonic::Request<RefreshUserPreKeysRequest>,
   ) -> Result<tonic::Response<Empty>, tonic::Status> {
     unimplemented!();
   }
 
   async fn verify_user_access_token(
     &self,
     _request: tonic::Request<VerifyUserAccessTokenRequest>,
   ) -> Result<tonic::Response<VerifyUserAccessTokenResponse>, tonic::Status> {
     unimplemented!();
   }
 }
 
 pub fn handle_db_error(db_error: DBError) -> tonic::Status {
   match db_error {
     DBError::AwsSdk(DynamoDBError::InternalServerError(_))
     | DBError::AwsSdk(DynamoDBError::ProvisionedThroughputExceededException(
       _,
     ))
     | DBError::AwsSdk(DynamoDBError::RequestLimitExceeded(_)) => {
       tonic::Status::unavailable("please retry")
     }
     e => {
       error!("Encountered an unexpected error: {}", e);
       tonic::Status::failed_precondition("unexpected error")
     }
   }
 }
diff --git a/services/identity/src/database.rs b/services/identity/src/database.rs
index 320e340db..d2db544bd 100644
--- a/services/identity/src/database.rs
+++ b/services/identity/src/database.rs
@@ -1,840 +1,837 @@
 use std::collections::HashMap;
 use std::fmt::{Display, Formatter, Result as FmtResult};
 use std::str::FromStr;
 use std::sync::Arc;
 
 use aws_config::SdkConfig;
 use aws_sdk_dynamodb::model::AttributeValue;
 use aws_sdk_dynamodb::output::{
   DeleteItemOutput, GetItemOutput, PutItemOutput, QueryOutput, UpdateItemOutput,
 };
 use aws_sdk_dynamodb::types::Blob;
 use aws_sdk_dynamodb::{Client, Error as DynamoDBError};
 use chrono::{DateTime, Utc};
 use opaque_ke::{errors::ProtocolError, ServerRegistration};
 use serde::{Deserialize, Serialize};
 use tracing::{debug, error, info, warn};
 
 use crate::config::CONFIG;
 use crate::constants::{
   ACCESS_TOKEN_SORT_KEY, ACCESS_TOKEN_TABLE,
   ACCESS_TOKEN_TABLE_AUTH_TYPE_ATTRIBUTE, ACCESS_TOKEN_TABLE_CREATED_ATTRIBUTE,
   ACCESS_TOKEN_TABLE_PARTITION_KEY, ACCESS_TOKEN_TABLE_TOKEN_ATTRIBUTE,
   ACCESS_TOKEN_TABLE_VALID_ATTRIBUTE, NONCE_TABLE,
   NONCE_TABLE_CREATED_ATTRIBUTE, NONCE_TABLE_PARTITION_KEY, USERS_TABLE,
   USERS_TABLE_DEVICES_ATTRIBUTE, USERS_TABLE_DEVICES_MAP_ATTRIBUTE_NAME,
   USERS_TABLE_DEVICE_ATTRIBUTE_NAME, USERS_TABLE_INITIALIZATION_INFO,
   USERS_TABLE_PARTITION_KEY, USERS_TABLE_REGISTRATION_ATTRIBUTE,
   USERS_TABLE_USERNAME_ATTRIBUTE, USERS_TABLE_USERNAME_INDEX,
   USERS_TABLE_WALLET_ADDRESS_ATTRIBUTE, USERS_TABLE_WALLET_ADDRESS_INDEX,
 };
 use crate::nonce::NonceData;
 use crate::token::{AccessTokenData, AuthType};
 use comm_opaque::Cipher;
 
 #[derive(Serialize, Deserialize)]
 pub struct OlmKeys {
-  curve25519: String,
-  ed25519: String,
+  pub curve25519: String,
+  pub ed25519: String,
 }
 
 #[derive(Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct KeyPayload {
   pub notification_identity_public_keys: OlmKeys,
   pub primary_identity_public_keys: OlmKeys,
 }
 
 impl FromStr for KeyPayload {
   type Err = serde_json::Error;
 
   // The payload is held in the database as an escaped JSON payload.
   // Escaped double quotes need to be trimmed before attempting to serialize
   fn from_str(payload: &str) -> Result<KeyPayload, Self::Err> {
     serde_json::from_str(&payload.replace(r#"\""#, r#"""#))
   }
 }
 
 #[derive(Clone)]
 pub struct DatabaseClient {
   client: Arc<Client>,
 }
 
 impl DatabaseClient {
   pub fn new(aws_config: &SdkConfig) -> Self {
     let client = match &CONFIG.localstack_endpoint {
       Some(endpoint) => {
         info!(
           "Configuring DynamoDB client to use LocalStack endpoint: {}",
           endpoint
         );
         let ddb_config_builder =
           aws_sdk_dynamodb::config::Builder::from(aws_config)
             .endpoint_url(endpoint);
         Client::from_conf(ddb_config_builder.build())
       }
       None => Client::new(aws_config),
     };
 
     DatabaseClient {
       client: Arc::new(client),
     }
   }
 
   pub async fn get_pake_registration(
     &self,
     user_id: String,
   ) -> Result<Option<ServerRegistration<Cipher>>, Error> {
     match self.get_item_from_users_table(&user_id).await {
       Ok(GetItemOutput {
         item: Some(mut item),
         ..
       }) => parse_registration_data_attribute(
         item.remove(USERS_TABLE_REGISTRATION_ATTRIBUTE),
       )
       .map(Some)
       .map_err(Error::Attribute),
       Ok(_) => {
         info!(
           "No item found for user {} in PAKE registration table",
           user_id
         );
         Ok(None)
       }
       Err(e) => {
         error!(
           "DynamoDB client failed to get registration data for user {}: {}",
           user_id, e
         );
         Err(e)
       }
     }
   }
 
   pub async fn get_session_initialization_info(
     &self,
     user_id: &str,
   ) -> Result<Option<HashMap<String, HashMap<String, String>>>, Error> {
     match self.get_item_from_users_table(user_id).await {
       Ok(GetItemOutput {
         item: Some(mut item),
         ..
       }) => parse_devices_attribute(item.remove(USERS_TABLE_DEVICES_ATTRIBUTE))
         .map(Some)
         .map_err(Error::Attribute),
       Ok(_) => {
         info!("No item found for user {} in users table", user_id);
         Ok(None)
       }
       Err(e) => {
         error!(
           "DynamoDB client failed to get session initialization info for user {}: {}",
           user_id, e
         );
         Err(e)
       }
     }
   }
 
   pub async fn update_users_table(
     &self,
     user_id: String,
     signing_public_key: Option<String>,
     registration: Option<ServerRegistration<Cipher>>,
     username: Option<String>,
     session_initialization_info: Option<&HashMap<String, String>>,
   ) -> Result<UpdateItemOutput, Error> {
     let mut update_expression_parts = Vec::new();
     let mut expression_attribute_names = HashMap::new();
     let mut expression_attribute_values = HashMap::new();
     if let Some(reg) = registration {
       update_expression_parts
         .push(format!("{} = :r", USERS_TABLE_REGISTRATION_ATTRIBUTE));
       expression_attribute_values.insert(
         ":r".to_string(),
         AttributeValue::B(Blob::new(reg.serialize())),
       );
     };
     if let Some(username) = username {
       update_expression_parts
         .push(format!("{} = :u", USERS_TABLE_USERNAME_ATTRIBUTE));
       expression_attribute_values
         .insert(":u".to_string(), AttributeValue::S(username));
     };
     if let Some(public_key) = signing_public_key {
       let device_info = match session_initialization_info {
         Some(info) => info
           .iter()
           .map(|(k, v)| (k.to_string(), AttributeValue::S(v.to_string())))
           .collect(),
         None => HashMap::new(),
       };
 
       // How we construct the update expression will depend on whether the user
       // already exists or not
       if let GetItemOutput { item: Some(_), .. } =
         self.get_item_from_users_table(&user_id).await?
       {
         update_expression_parts.push(format!(
           "{}.#{} = :k",
           USERS_TABLE_DEVICES_ATTRIBUTE, USERS_TABLE_DEVICES_MAP_ATTRIBUTE_NAME,
         ));
         expression_attribute_names.insert(
           format!("#{}", USERS_TABLE_DEVICES_MAP_ATTRIBUTE_NAME),
           public_key,
         );
         expression_attribute_values
           .insert(":k".to_string(), AttributeValue::M(device_info));
       } else {
         update_expression_parts
           .push(format!("{} = :k", USERS_TABLE_DEVICES_ATTRIBUTE));
         let mut devices = HashMap::new();
         devices.insert(public_key, AttributeValue::M(device_info));
         expression_attribute_values
           .insert(":k".to_string(), AttributeValue::M(devices));
       };
     };
 
     self
       .client
       .update_item()
       .table_name(USERS_TABLE)
       .key(USERS_TABLE_PARTITION_KEY, AttributeValue::S(user_id))
       .update_expression(format!("SET {}", update_expression_parts.join(",")))
       .set_expression_attribute_names(
         if expression_attribute_names.is_empty() {
           None
         } else {
           Some(expression_attribute_names)
         },
       )
       .set_expression_attribute_values(
         if expression_attribute_values.is_empty() {
           None
         } else {
           Some(expression_attribute_values)
         },
       )
       .send()
       .await
       .map_err(|e| Error::AwsSdk(e.into()))
   }
 
   pub async fn add_user_to_users_table(
     &self,
     user_id: String,
     registration: ServerRegistration<Cipher>,
     username: String,
     signing_public_key: String,
     session_initialization_info: &HashMap<String, String>,
   ) -> Result<PutItemOutput, Error> {
     let device_info: HashMap<String, AttributeValue> =
       session_initialization_info
         .iter()
         .map(|(k, v)| (k.to_string(), AttributeValue::S(v.to_string())))
         .collect();
 
     let item = HashMap::from([
       (
         USERS_TABLE_PARTITION_KEY.to_string(),
         AttributeValue::S(user_id),
       ),
       (
         USERS_TABLE_USERNAME_ATTRIBUTE.to_string(),
         AttributeValue::S(username),
       ),
       (
         USERS_TABLE_REGISTRATION_ATTRIBUTE.to_string(),
         AttributeValue::B(Blob::new(registration.serialize())),
       ),
       (
         USERS_TABLE_DEVICES_ATTRIBUTE.to_string(),
         AttributeValue::M(HashMap::from([(
           signing_public_key,
           AttributeValue::M(device_info),
         )])),
       ),
     ]);
 
     self
       .client
       .put_item()
       .table_name(USERS_TABLE)
       .set_item(Some(item))
       .send()
       .await
       .map_err(|e| Error::AwsSdk(e.into()))
   }
 
   pub async fn delete_user(
     &self,
     user_id: String,
   ) -> Result<DeleteItemOutput, Error> {
     debug!("Attempting to delete user: {}", user_id);
 
     match self
       .client
       .delete_item()
       .table_name(USERS_TABLE)
       .key(
         USERS_TABLE_PARTITION_KEY,
         AttributeValue::S(user_id.clone()),
       )
       .send()
       .await
     {
       Ok(out) => {
         info!("User has been deleted {}", user_id);
         Ok(out)
       }
       Err(e) => {
         error!("DynamoDB client failed to delete user {}", user_id);
         Err(Error::AwsSdk(e.into()))
       }
     }
   }
 
   pub async fn get_access_token_data(
     &self,
     user_id: String,
     signing_public_key: String,
   ) -> Result<Option<AccessTokenData>, Error> {
     let primary_key = create_composite_primary_key(
       (
         ACCESS_TOKEN_TABLE_PARTITION_KEY.to_string(),
         user_id.clone(),
       ),
       (
         ACCESS_TOKEN_SORT_KEY.to_string(),
         signing_public_key.clone(),
       ),
     );
     let get_item_result = self
       .client
       .get_item()
       .table_name(ACCESS_TOKEN_TABLE)
       .set_key(Some(primary_key))
       .consistent_read(true)
       .send()
       .await;
     match get_item_result {
       Ok(GetItemOutput {
         item: Some(mut item),
         ..
       }) => {
         let created = parse_created_attribute(
           item.remove(ACCESS_TOKEN_TABLE_CREATED_ATTRIBUTE),
         )?;
         let auth_type = parse_auth_type_attribute(
           item.remove(ACCESS_TOKEN_TABLE_AUTH_TYPE_ATTRIBUTE),
         )?;
         let valid = parse_valid_attribute(
           item.remove(ACCESS_TOKEN_TABLE_VALID_ATTRIBUTE),
         )?;
         let access_token = parse_token_attribute(
           item.remove(ACCESS_TOKEN_TABLE_TOKEN_ATTRIBUTE),
         )?;
         Ok(Some(AccessTokenData {
           user_id,
           signing_public_key,
           access_token,
           created,
           auth_type,
           valid,
         }))
       }
       Ok(_) => {
         info!(
           "No item found for user {} and signing public key {} in token table",
           user_id, signing_public_key
         );
         Ok(None)
       }
       Err(e) => {
         error!(
           "DynamoDB client failed to get token for user {} with signing public key {}: {}",
           user_id, signing_public_key, e
         );
         Err(Error::AwsSdk(e.into()))
       }
     }
   }
 
   pub async fn put_access_token_data(
     &self,
     access_token_data: AccessTokenData,
   ) -> Result<PutItemOutput, Error> {
     let item = HashMap::from([
       (
         ACCESS_TOKEN_TABLE_PARTITION_KEY.to_string(),
         AttributeValue::S(access_token_data.user_id),
       ),
       (
         ACCESS_TOKEN_SORT_KEY.to_string(),
         AttributeValue::S(access_token_data.signing_public_key),
       ),
       (
         ACCESS_TOKEN_TABLE_TOKEN_ATTRIBUTE.to_string(),
         AttributeValue::S(access_token_data.access_token),
       ),
       (
         ACCESS_TOKEN_TABLE_CREATED_ATTRIBUTE.to_string(),
         AttributeValue::S(access_token_data.created.to_rfc3339()),
       ),
       (
         ACCESS_TOKEN_TABLE_AUTH_TYPE_ATTRIBUTE.to_string(),
         AttributeValue::S(match access_token_data.auth_type {
           AuthType::Password => "password".to_string(),
           AuthType::Wallet => "wallet".to_string(),
         }),
       ),
       (
         ACCESS_TOKEN_TABLE_VALID_ATTRIBUTE.to_string(),
         AttributeValue::Bool(access_token_data.valid),
       ),
     ]);
     self
       .client
       .put_item()
       .table_name(ACCESS_TOKEN_TABLE)
       .set_item(Some(item))
       .send()
       .await
       .map_err(|e| Error::AwsSdk(e.into()))
   }
 
-  pub async fn username_available(
-    &self,
-    username: String,
-  ) -> Result<bool, Error> {
+  pub async fn username_taken(&self, username: String) -> Result<bool, Error> {
     let result = self
       .get_user_id_from_user_info(username, AuthType::Password)
       .await?;
 
-    Ok(result.is_none())
+    Ok(result.is_some())
   }
 
   pub async fn get_user_id_from_user_info(
     &self,
     user_info: String,
     auth_type: AuthType,
   ) -> Result<Option<String>, Error> {
     let (index, attribute_name) = match auth_type {
       AuthType::Password => {
         (USERS_TABLE_USERNAME_INDEX, USERS_TABLE_USERNAME_ATTRIBUTE)
       }
       AuthType::Wallet => (
         USERS_TABLE_WALLET_ADDRESS_INDEX,
         USERS_TABLE_WALLET_ADDRESS_ATTRIBUTE,
       ),
     };
     match self
       .client
       .query()
       .table_name(USERS_TABLE)
       .index_name(index)
       .key_condition_expression(format!("{} = :u", attribute_name))
       .expression_attribute_values(":u", AttributeValue::S(user_info.clone()))
       .send()
       .await
     {
       Ok(QueryOutput {
         items: Some(mut items),
         ..
       }) => {
         let num_items = items.len();
         if num_items == 0 {
           return Ok(None);
         }
         if num_items > 1 {
           warn!(
             "{} user IDs associated with {} {}: {:?}",
             num_items, attribute_name, user_info, items
           );
         }
         parse_string_attribute(
           USERS_TABLE_PARTITION_KEY,
           items[0].remove(USERS_TABLE_PARTITION_KEY),
         )
         .map(Some)
         .map_err(Error::Attribute)
       }
       Ok(_) => {
         info!(
           "No item found for {} {} in users table",
           attribute_name, user_info
         );
         Ok(None)
       }
       Err(e) => {
         error!(
           "DynamoDB client failed to get user ID from {} {}: {}",
           attribute_name, user_info, e
         );
         Err(Error::AwsSdk(e.into()))
       }
     }
   }
 
   pub async fn get_item_from_users_table(
     &self,
     user_id: &str,
   ) -> Result<GetItemOutput, Error> {
     let primary_key = create_simple_primary_key((
       USERS_TABLE_PARTITION_KEY.to_string(),
       user_id.to_string(),
     ));
     self
       .client
       .get_item()
       .table_name(USERS_TABLE)
       .set_key(Some(primary_key))
       .consistent_read(true)
       .send()
       .await
       .map_err(|e| Error::AwsSdk(e.into()))
   }
 
   pub async fn get_users(&self) -> Result<Vec<String>, Error> {
     let scan_output = self
       .client
       .scan()
       .table_name(USERS_TABLE)
       .projection_expression(USERS_TABLE_PARTITION_KEY)
       .send()
       .await
       .map_err(|e| Error::AwsSdk(e.into()))?;
 
     let mut result = Vec::new();
     if let Some(attributes) = scan_output.items {
       for mut attribute in attributes {
         let id = parse_string_attribute(
           USERS_TABLE_PARTITION_KEY,
           attribute.remove(USERS_TABLE_PARTITION_KEY),
         )
         .map_err(Error::Attribute)?;
         result.push(id);
       }
     }
     Ok(result)
   }
 
   pub async fn add_nonce_to_nonces_table(
     &self,
     nonce_data: NonceData,
   ) -> Result<PutItemOutput, Error> {
     let item = HashMap::from([
       (
         NONCE_TABLE_PARTITION_KEY.to_string(),
         AttributeValue::S(nonce_data.nonce),
       ),
       (
         NONCE_TABLE_CREATED_ATTRIBUTE.to_string(),
         AttributeValue::S(nonce_data.created.to_rfc3339()),
       ),
     ]);
     self
       .client
       .put_item()
       .table_name(NONCE_TABLE)
       .set_item(Some(item))
       .send()
       .await
       .map_err(|e| Error::AwsSdk(e.into()))
   }
 }
 
 #[derive(
   Debug, derive_more::Display, derive_more::From, derive_more::Error,
 )]
 pub enum Error {
   #[display(...)]
   AwsSdk(DynamoDBError),
   #[display(...)]
   Attribute(DBItemError),
 }
 
 #[derive(Debug, derive_more::Error, derive_more::Constructor)]
 pub struct DBItemError {
   attribute_name: &'static str,
   attribute_value: Option<AttributeValue>,
   attribute_error: DBItemAttributeError,
 }
 
 impl Display for DBItemError {
   fn fmt(&self, f: &mut Formatter) -> FmtResult {
     match &self.attribute_error {
       DBItemAttributeError::Missing => {
         write!(f, "Attribute {} is missing", self.attribute_name)
       }
       DBItemAttributeError::IncorrectType => write!(
         f,
         "Value for attribute {} has incorrect type: {:?}",
         self.attribute_name, self.attribute_value
       ),
       error => write!(
         f,
         "Error regarding attribute {} with value {:?}: {}",
         self.attribute_name, self.attribute_value, error
       ),
     }
   }
 }
 
 #[derive(Debug, derive_more::Display, derive_more::Error)]
 pub enum DBItemAttributeError {
   #[display(...)]
   Missing,
   #[display(...)]
   IncorrectType,
   #[display(...)]
   InvalidTimestamp(chrono::ParseError),
   #[display(...)]
   Pake(ProtocolError),
 }
 
 type AttributeName = String;
 
 fn create_simple_primary_key(
   partition_key: (AttributeName, String),
 ) -> HashMap<AttributeName, AttributeValue> {
   HashMap::from([(partition_key.0, AttributeValue::S(partition_key.1))])
 }
 
 fn create_composite_primary_key(
   partition_key: (AttributeName, String),
   sort_key: (AttributeName, String),
 ) -> HashMap<AttributeName, AttributeValue> {
   let mut primary_key = create_simple_primary_key(partition_key);
   primary_key.insert(sort_key.0, AttributeValue::S(sort_key.1));
   primary_key
 }
 
 fn parse_created_attribute(
   attribute: Option<AttributeValue>,
 ) -> Result<DateTime<Utc>, DBItemError> {
   if let Some(AttributeValue::S(created)) = &attribute {
     created.parse().map_err(|e| {
       DBItemError::new(
         ACCESS_TOKEN_TABLE_CREATED_ATTRIBUTE,
         attribute,
         DBItemAttributeError::InvalidTimestamp(e),
       )
     })
   } else {
     Err(DBItemError::new(
       ACCESS_TOKEN_TABLE_CREATED_ATTRIBUTE,
       attribute,
       DBItemAttributeError::Missing,
     ))
   }
 }
 
 fn parse_auth_type_attribute(
   attribute: Option<AttributeValue>,
 ) -> Result<AuthType, DBItemError> {
   if let Some(AttributeValue::S(auth_type)) = &attribute {
     match auth_type.as_str() {
       "password" => Ok(AuthType::Password),
       "wallet" => Ok(AuthType::Wallet),
       _ => Err(DBItemError::new(
         ACCESS_TOKEN_TABLE_AUTH_TYPE_ATTRIBUTE,
         attribute,
         DBItemAttributeError::IncorrectType,
       )),
     }
   } else {
     Err(DBItemError::new(
       ACCESS_TOKEN_TABLE_AUTH_TYPE_ATTRIBUTE,
       attribute,
       DBItemAttributeError::Missing,
     ))
   }
 }
 
 fn parse_valid_attribute(
   attribute: Option<AttributeValue>,
 ) -> Result<bool, DBItemError> {
   match attribute {
     Some(AttributeValue::Bool(valid)) => Ok(valid),
     Some(_) => Err(DBItemError::new(
       ACCESS_TOKEN_TABLE_VALID_ATTRIBUTE,
       attribute,
       DBItemAttributeError::IncorrectType,
     )),
     None => Err(DBItemError::new(
       ACCESS_TOKEN_TABLE_VALID_ATTRIBUTE,
       attribute,
       DBItemAttributeError::Missing,
     )),
   }
 }
 
 fn parse_token_attribute(
   attribute: Option<AttributeValue>,
 ) -> Result<String, DBItemError> {
   match attribute {
     Some(AttributeValue::S(token)) => Ok(token),
     Some(_) => Err(DBItemError::new(
       ACCESS_TOKEN_TABLE_TOKEN_ATTRIBUTE,
       attribute,
       DBItemAttributeError::IncorrectType,
     )),
     None => Err(DBItemError::new(
       ACCESS_TOKEN_TABLE_TOKEN_ATTRIBUTE,
       attribute,
       DBItemAttributeError::Missing,
     )),
   }
 }
 
 fn parse_registration_data_attribute(
   attribute: Option<AttributeValue>,
 ) -> Result<ServerRegistration<Cipher>, DBItemError> {
   match &attribute {
     Some(AttributeValue::B(server_registration_bytes)) => {
       match ServerRegistration::<Cipher>::deserialize(
         server_registration_bytes.as_ref(),
       ) {
         Ok(server_registration) => Ok(server_registration),
         Err(e) => Err(DBItemError::new(
           USERS_TABLE_REGISTRATION_ATTRIBUTE,
           attribute,
           DBItemAttributeError::Pake(e),
         )),
       }
     }
     Some(_) => Err(DBItemError::new(
       USERS_TABLE_REGISTRATION_ATTRIBUTE,
       attribute,
       DBItemAttributeError::IncorrectType,
     )),
     None => Err(DBItemError::new(
       USERS_TABLE_REGISTRATION_ATTRIBUTE,
       attribute,
       DBItemAttributeError::Missing,
     )),
   }
 }
 
 fn parse_devices_attribute(
   attribute: Option<AttributeValue>,
 ) -> Result<HashMap<String, HashMap<String, String>>, DBItemError> {
   let mut devices = HashMap::new();
   let ddb_devices =
     parse_map_attribute(USERS_TABLE_DEVICES_ATTRIBUTE, attribute)?;
 
   for (signing_public_key, session_initialization_info) in ddb_devices {
     let session_initialization_info_map = parse_map_attribute(
       USERS_TABLE_DEVICE_ATTRIBUTE_NAME,
       Some(session_initialization_info),
     )?;
     let mut inner_hash_map = HashMap::new();
     for (initialization_component_name, initialization_component_value) in
       session_initialization_info_map
     {
       let initialization_piece_value_string = parse_string_attribute(
         USERS_TABLE_INITIALIZATION_INFO,
         Some(initialization_component_value),
       )?;
       inner_hash_map.insert(
         initialization_component_name,
         initialization_piece_value_string,
       );
     }
     devices.insert(signing_public_key, inner_hash_map);
   }
   Ok(devices)
 }
 
 fn parse_map_attribute(
   attribute_name: &'static str,
   attribute_value: Option<AttributeValue>,
 ) -> Result<HashMap<String, AttributeValue>, DBItemError> {
   match attribute_value {
     Some(AttributeValue::M(map)) => Ok(map),
     Some(_) => Err(DBItemError::new(
       attribute_name,
       attribute_value,
       DBItemAttributeError::IncorrectType,
     )),
     None => Err(DBItemError::new(
       attribute_name,
       attribute_value,
       DBItemAttributeError::Missing,
     )),
   }
 }
 
 fn parse_string_attribute(
   attribute_name: &'static str,
   attribute_value: Option<AttributeValue>,
 ) -> Result<String, DBItemError> {
   match attribute_value {
     Some(AttributeValue::S(value)) => Ok(value),
     Some(_) => Err(DBItemError::new(
       attribute_name,
       attribute_value,
       DBItemAttributeError::IncorrectType,
     )),
     None => Err(DBItemError::new(
       attribute_name,
       attribute_value,
       DBItemAttributeError::Missing,
     )),
   }
 }
 
 #[cfg(test)]
 mod tests {
   use super::*;
 
   #[test]
   fn test_create_simple_primary_key() {
     let partition_key_name = "userID".to_string();
     let partition_key_value = "12345".to_string();
     let partition_key =
       (partition_key_name.clone(), partition_key_value.clone());
     let mut primary_key = create_simple_primary_key(partition_key);
     assert_eq!(primary_key.len(), 1);
     let attribute = primary_key.remove(&partition_key_name);
     assert!(attribute.is_some());
     assert_eq!(attribute, Some(AttributeValue::S(partition_key_value)));
   }
 
   #[test]
   fn test_create_composite_primary_key() {
     let partition_key_name = "userID".to_string();
     let partition_key_value = "12345".to_string();
     let partition_key =
       (partition_key_name.clone(), partition_key_value.clone());
     let sort_key_name = "deviceID".to_string();
     let sort_key_value = "54321".to_string();
     let sort_key = (sort_key_name.clone(), sort_key_value.clone());
     let mut primary_key = create_composite_primary_key(partition_key, sort_key);
     assert_eq!(primary_key.len(), 2);
     let partition_key_attribute = primary_key.remove(&partition_key_name);
     assert!(partition_key_attribute.is_some());
     assert_eq!(
       partition_key_attribute,
       Some(AttributeValue::S(partition_key_value))
     );
     let sort_key_attribute = primary_key.remove(&sort_key_name);
     assert!(sort_key_attribute.is_some());
     assert_eq!(sort_key_attribute, Some(AttributeValue::S(sort_key_value)))
   }
 
   #[test]
   fn validate_keys() {
     // Taken from test user
     let example_payload = r#"{\"notificationIdentityPublicKeys\":{\"curve25519\":\"DYmV8VdkjwG/VtC8C53morogNJhpTPT/4jzW0/cxzQo\",\"ed25519\":\"D0BV2Y7Qm36VUtjwyQTJJWYAycN7aMSJmhEsRJpW2mk\"},\"primaryIdentityPublicKeys\":{\"curve25519\":\"Y4ZIqzpE1nv83kKGfvFP6rifya0itRg2hifqYtsISnk\",\"ed25519\":\"cSlL+VLLJDgtKSPlIwoCZg0h0EmHlQoJC08uV/O+jvg\"}}"#;
     let serialized_payload = KeyPayload::from_str(&example_payload).unwrap();
 
     assert_eq!(
       serialized_payload
         .notification_identity_public_keys
         .curve25519,
       "DYmV8VdkjwG/VtC8C53morogNJhpTPT/4jzW0/cxzQo"
     );
   }
 }
diff --git a/services/identity/src/id.rs b/services/identity/src/id.rs
new file mode 100644
index 000000000..f256290d2
--- /dev/null
+++ b/services/identity/src/id.rs
@@ -0,0 +1,18 @@
+use uuid::Uuid;
+
+pub fn generate_uuid() -> String {
+  let mut buf = [b'\0'; 36];
+  Uuid::new_v4().hyphenated().encode_upper(&mut buf);
+  std::str::from_utf8(&buf)
+    .expect("Unable to create UUID")
+    .to_string()
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+  #[test]
+  fn test_generate_uuid() {
+    generate_uuid();
+  }
+}
diff --git a/services/identity/src/main.rs b/services/identity/src/main.rs
index 1cadd5173..63c31c4a2 100644
--- a/services/identity/src/main.rs
+++ b/services/identity/src/main.rs
@@ -1,71 +1,79 @@
+use std::time::Duration;
+
 use clap::{Parser, Subcommand};
 use database::DatabaseClient;
+use moka::future::Cache;
 use tonic::transport::Server;
 use tracing_subscriber::FmtSubscriber;
 
 mod client_service;
 mod config;
 pub mod constants;
 mod database;
+mod id;
 mod interceptor;
 mod keygen;
 mod nonce;
 mod token;
 
 use config::load_config;
 use constants::{IDENTITY_SERVICE_SOCKET_ADDR, SECRETS_DIRECTORY};
 use keygen::generate_and_persist_keypair;
 use tracing::info;
 
 use client_service::{ClientService, IdentityClientServiceServer};
 
 #[derive(Parser)]
 #[clap(author, version, about, long_about = None)]
 #[clap(propagate_version = true)]
 struct Cli {
   #[clap(subcommand)]
   command: Commands,
 }
 
 #[derive(Subcommand)]
 enum Commands {
   /// Runs the server
   Server,
   /// Generates and persists a keypair to use for PAKE registration and login
   Keygen {
     #[clap(short, long)]
     #[clap(default_value_t = String::from(SECRETS_DIRECTORY))]
     dir: String,
   },
   /// Populates the `identity-users` table in DynamoDB from MySQL
   PopulateDB,
 }
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
   let subscriber = FmtSubscriber::new();
   tracing::subscriber::set_global_default(subscriber)?;
   let cli = Cli::parse();
   match &cli.command {
     Commands::Keygen { dir } => {
       generate_and_persist_keypair(dir)?;
     }
     Commands::Server => {
       load_config();
       let addr = IDENTITY_SERVICE_SOCKET_ADDR.parse()?;
       let aws_config = aws_config::from_env().region("us-east-2").load().await;
       let database_client = DatabaseClient::new(&aws_config);
-      let client_service =
-        IdentityClientServiceServer::new(ClientService::new(database_client));
+      let workflow_cache = Cache::builder()
+        .time_to_live(Duration::from_secs(10))
+        .build();
+      let client_service = IdentityClientServiceServer::new(
+        ClientService::new(database_client, workflow_cache),
+      );
       info!("Listening to gRPC traffic on {}", addr);
       Server::builder()
         .accept_http1(true)
         .add_service(tonic_web::enable(client_service))
         .serve(addr)
         .await?;
     }
     Commands::PopulateDB => unimplemented!(),
   }
 
   Ok(())
 }
diff --git a/shared/comm-opaque2/Cargo.lock b/shared/comm-opaque2/Cargo.lock
index 055ac1fa6..eab4535e0 100644
--- a/shared/comm-opaque2/Cargo.lock
+++ b/shared/comm-opaque2/Cargo.lock
@@ -1,870 +1,826 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 version = 3
 
 [[package]]
 name = "argon2"
 version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "db4ce4441f99dbd377ca8a8f57b698c44d0d6e712d8329b5040da5a64aa1ce73"
 dependencies = [
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  "password-hash",
 ]
 
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad445822218ce64be7a341abfb0b1ea43b5c23aa83902542a4542e78309d8e5e"
-dependencies = [
- "async-stream-impl",
- "futures-core",
- "pin-project-lite",
-]
-
-[[package]]
-name = "async-stream-impl"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4655ae1a7b0cdf149156f780c5bf3f1352bc53cbd9e0a361a7ef7b22947e965"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "autocfg"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
 [[package]]
 name = "base16ct"
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 [[package]]
 name = "base64"
-version = "0.13.1"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
+checksum = "a4a4ddaa51a5bc52a6948f74c06d20aaaddb71924eab79b8c97a8c556e942d6a"
 
 [[package]]
 name = "base64ct"
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 [[package]]
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 [[package]]
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- "bytes",
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- "pin-project-lite",
- "tokio",
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-]
-
 [[package]]
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-checksum = "8f219fad3b929bef19b1f86fbc0358d35daed8f2cac972037ac0dc10bbb8d5fb"
+checksum = "3082666a3a6433f7f511c7192923fa1fe07c69332d3c6a2e6bb040b569199d5a"
 dependencies = [
- "async-stream",
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  "windows_x86_64_gnullvm",
  "windows_x86_64_msvc",
 ]
 
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 ]
diff --git a/shared/comm-opaque2/Cargo.toml b/shared/comm-opaque2/Cargo.toml
index b8c62428a..d26f94a0a 100644
--- a/shared/comm-opaque2/Cargo.toml
+++ b/shared/comm-opaque2/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
 name = "comm-opaque2"
 version = "0.2.0"
 edition = "2021"
 
 [dependencies]
 argon2 = "0.4"
 log = "0.4"
 opaque-ke = { version = "2.0", features = [ "argon2" ] }
 rand = "0.8"
-tonic = { version = "0.8", default-features = false }
+tonic = { version = "0.9.1", default-features = false }
 wasm-bindgen = "0.2"