diff --git a/keyserver/addons/rust-node-addon/Cargo.lock b/keyserver/addons/rust-node-addon/Cargo.lock
--- a/keyserver/addons/rust-node-addon/Cargo.lock
+++ b/keyserver/addons/rust-node-addon/Cargo.lock
@@ -47,7 +47,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -58,7 +58,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -192,6 +192,7 @@
  "log",
  "opaque-ke",
  "rand",
+ "serde",
  "tonic",
  "wasm-bindgen",
 ]
@@ -469,6 +470,7 @@
 dependencies = [
  "derive_more",
  "prost",
+ "serde",
  "tonic",
  "tonic-build",
  "tracing",
@@ -907,9 +909,9 @@
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.56"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b63bdb0cd06f1f4dedf69b254734f9b45af66e4a031e42a7480257d9898b435"
+checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
 dependencies = [
  "unicode-ident",
 ]
@@ -970,9 +972,9 @@
 
 [[package]]
 name = "quote"
-version = "1.0.26"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4424af4bf778aae2051a77b60283332f386554255d722233d09fbfc7e30da2fc"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
 dependencies = [
  "proc-macro2",
 ]
@@ -1169,22 +1171,22 @@
 
 [[package]]
 name = "serde"
-version = "1.0.152"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb7d1f0d3021d347a83e556fc4683dea2ea09d87bccdf88ff5c12545d89d5efb"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.152"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af487d118eecd09402d70a5d72551860e788df87b464af30e5ea6a38c75c541e"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.107",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -1268,9 +1270,9 @@
 
 [[package]]
 name = "syn"
-version = "2.0.15"
+version = "2.0.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a34fcf3e8b60f57e6a14301a2e916d323af98b0ea63c599441eec8558660c822"
+checksum = "6ab617d94515e94ae53b8406c628598680aa0c9587474ecbe58188f7b345d66c"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/native/native_rust_library/Cargo.lock b/native/native_rust_library/Cargo.lock
--- a/native/native_rust_library/Cargo.lock
+++ b/native/native_rust_library/Cargo.lock
@@ -89,7 +89,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -100,7 +100,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -335,6 +335,7 @@
  "log",
  "opaque-ke",
  "rand",
+ "serde",
  "tonic",
  "wasm-bindgen",
 ]
@@ -720,6 +721,7 @@
 dependencies = [
  "derive_more",
  "prost",
+ "serde",
  "tonic",
  "tonic-build",
  "tracing",
@@ -1190,7 +1192,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -1311,9 +1313,9 @@
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.70"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39278fbbf5fb4f646ce651690877f89d1c5811a3d4acb27700c1cb3cdb78fd3b"
+checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
 dependencies = [
  "unicode-ident",
 ]
@@ -1374,9 +1376,9 @@
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
 dependencies = [
  "proc-macro2",
 ]
@@ -1709,22 +1711,22 @@
 
 [[package]]
 name = "serde"
-version = "1.0.193"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25dd9975e68d0cb5aa1120c288333fc98731bd1dd12f561e468ea4728c042b89"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.193"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43576ca501357b9b071ac53cdc7da8ef0cbd9493d8df094cd821777ea6e894d3"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -1847,9 +1849,9 @@
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "6ab617d94515e94ae53b8406c628598680aa0c9587474ecbe58188f7b345d66c"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1935,7 +1937,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -1998,7 +2000,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -2402,7 +2404,7 @@
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.51",
  "wasm-bindgen-shared",
 ]
 
@@ -2436,7 +2438,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.51",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
diff --git a/services/blob/Cargo.lock b/services/blob/Cargo.lock
--- a/services/blob/Cargo.lock
+++ b/services/blob/Cargo.lock
@@ -1518,6 +1518,7 @@
 dependencies = [
  "derive_more",
  "prost",
+ "serde",
  "tonic 0.9.2",
  "tonic-build",
  "tracing",
diff --git a/services/commtest/Cargo.lock b/services/commtest/Cargo.lock
--- a/services/commtest/Cargo.lock
+++ b/services/commtest/Cargo.lock
@@ -319,6 +319,7 @@
  "log",
  "opaque-ke",
  "rand",
+ "serde",
  "tonic 0.9.2",
  "wasm-bindgen",
 ]
@@ -714,6 +715,7 @@
 dependencies = [
  "derive_more",
  "prost",
+ "serde",
  "tonic 0.9.2",
  "tonic-build 0.9.2",
  "tracing",
@@ -1609,18 +1611,18 @@
 
 [[package]]
 name = "serde"
-version = "1.0.194"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b114498256798c94a0689e1a15fec6005dee8ac1f41de56404b67afc2a4b773"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.194"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3385e45322e8f9931410f01b3031ec534c3947d0e94c18049af4d9f9907d4e0"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/services/identity/Cargo.lock b/services/identity/Cargo.lock
--- a/services/identity/Cargo.lock
+++ b/services/identity/Cargo.lock
@@ -869,6 +869,7 @@
  "log",
  "opaque-ke",
  "rand 0.8.5",
+ "serde",
  "tonic",
  "wasm-bindgen",
 ]
@@ -1756,6 +1757,7 @@
 dependencies = [
  "derive_more",
  "prost",
+ "serde",
  "tonic",
  "tonic-build",
  "tracing",
@@ -3566,18 +3568,18 @@
 
 [[package]]
 name = "serde"
-version = "1.0.195"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "63261df402c67811e9ac6def069e4786148c4563f4b50fd4bf30aa370d626b02"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.195"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46fe8f8603d81ba86327b23a2e9cdf49e1255fb94a4c5f297f6ee0547178ea2c"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote 1.0.35",
diff --git a/services/identity/src/client_service.rs b/services/identity/src/client_service.rs
--- a/services/identity/src/client_service.rs
+++ b/services/identity/src/client_service.rs
@@ -7,6 +7,7 @@
 use comm_opaque2::grpc::protocol_error_to_grpc_status;
 use moka::future::Cache;
 use rand::rngs::OsRng;
+use serde::{Deserialize, Serialize};
 use siwe::eip55;
 use tonic::Response;
 use tracing::{debug, error, warn};
@@ -48,33 +49,33 @@
     IdentityClientService, IdentityClientServiceServer,
   };
 
-#[derive(Clone)]
+#[derive(Clone, Serialize, Deserialize)]
 pub enum WorkflowInProgress {
   Registration(Box<UserRegistrationInfo>),
   Login(Box<UserLoginInfo>),
   Update(UpdateState),
 }
 
-#[derive(Clone)]
+#[derive(Clone, Serialize, Deserialize)]
 pub struct UserRegistrationInfo {
   pub username: String,
   pub flattened_device_key_upload: FlattenedDeviceKeyUpload,
   pub user_id: Option<String>,
 }
 
-#[derive(Clone)]
+#[derive(Clone, Serialize, Deserialize)]
 pub struct UserLoginInfo {
   pub user_id: String,
   pub flattened_device_key_upload: FlattenedDeviceKeyUpload,
   pub opaque_server_login: comm_opaque2::server::Login,
 }
 
-#[derive(Clone)]
+#[derive(Clone, Serialize, Deserialize)]
 pub struct UpdateState {
   pub user_id: String,
 }
 
-#[derive(Clone)]
+#[derive(Clone, Serialize, Deserialize)]
 pub struct FlattenedDeviceKeyUpload {
   pub device_id_key: String,
   pub key_payload: String,
diff --git a/services/identity/src/constants.rs b/services/identity/src/constants.rs
--- a/services/identity/src/constants.rs
+++ b/services/identity/src/constants.rs
@@ -71,6 +71,11 @@
 pub const NONCE_TABLE_EXPIRATION_TIME_UNIX_ATTRIBUTE: &str =
   "expirationTimeUnix";
 
+pub const WORKFLOWS_IN_PROGRESS_TABLE: &str = "identity-workflows-in-progress";
+pub const WORKFLOWS_IN_PROGRESS_PARTITION_KEY: &str = "id";
+pub const WORKFLOWS_IN_PROGRESS_TABLE_EXPIRATION_TIME_UNIX_ATTRIBUTE: &str =
+  "expirationTimeUnix";
+
 // Usernames reserved because they exist in Ashoat's keyserver already
 pub const RESERVED_USERNAMES_TABLE: &str = "identity-reserved-usernames";
 pub const RESERVED_USERNAMES_TABLE_PARTITION_KEY: &str = "username";
@@ -151,6 +156,10 @@
 pub const NONCE_LENGTH: usize = 17;
 pub const NONCE_TTL_DURATION: i64 = 120; // seconds
 
+// Workflows in progress
+
+pub const WORKFLOWS_IN_PROGRESS_TTL_DURATION: i64 = 120; // seconds
+
 // Identity
 
 pub const DEFAULT_IDENTITY_ENDPOINT: &str = "http://localhost:50054";
diff --git a/services/tunnelbroker/Cargo.lock b/services/tunnelbroker/Cargo.lock
--- a/services/tunnelbroker/Cargo.lock
+++ b/services/tunnelbroker/Cargo.lock
@@ -255,7 +255,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -272,7 +272,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -858,7 +858,7 @@
  "heck",
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -979,6 +979,9 @@
 version = "0.3.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8eb30d70a07a3b04884d2677f06bec33509dc67ca60d92949e5535352d3191dc"
+dependencies = [
+ "powerfmt",
+]
 
 [[package]]
 name = "derive_more"
@@ -1147,7 +1150,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -1210,6 +1213,7 @@
 dependencies = [
  "derive_more",
  "prost",
+ "serde",
  "tonic 0.9.2",
  "tonic-build 0.9.2",
  "tracing",
@@ -1622,6 +1626,12 @@
  "winapi",
 ]
 
+[[package]]
+name = "num-conv"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
+
 [[package]]
 name = "num-integer"
 version = "0.1.45"
@@ -1806,6 +1816,12 @@
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "powerfmt"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.17"
@@ -1824,9 +1840,9 @@
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.71"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75cb1540fadbd5b8fbccc4dddad2734eba435053f725621c070711a14bb5f4b8"
+checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
 dependencies = [
  "unicode-ident",
 ]
@@ -1887,9 +1903,9 @@
 
 [[package]]
 name = "quote"
-version = "1.0.26"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4424af4bf778aae2051a77b60283332f386554255d722233d09fbfc7e30da2fc"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
 dependencies = [
  "proc-macro2",
 ]
@@ -2187,22 +2203,22 @@
 
 [[package]]
 name = "serde"
-version = "1.0.160"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb2f3770c8bce3bcda7e149193a069a0f4365bda1fa5cd88e03bca26afc1216c"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.160"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "291a097c63d8497e00160b166a967a4a79c64f3facdd01cbd7502231688d77df"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -2322,9 +2338,9 @@
 
 [[package]]
 name = "syn"
-version = "2.0.15"
+version = "2.0.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a34fcf3e8b60f57e6a14301a2e916d323af98b0ea63c599441eec8558660c822"
+checksum = "6ab617d94515e94ae53b8406c628598680aa0c9587474ecbe58188f7b345d66c"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2379,7 +2395,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -2394,11 +2410,13 @@
 
 [[package]]
 name = "time"
-version = "0.3.26"
+version = "0.3.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a79d09ac6b08c1ab3906a2f7cc2e81a0e27c7ae89c63812df75e52bef0751e07"
+checksum = "c8248b6521bb14bc45b4067159b9b6ad792e2d6d754d6c41fb50e29fefe38749"
 dependencies = [
  "deranged",
+ "num-conv",
+ "powerfmt",
  "serde",
  "time-core",
  "time-macros",
@@ -2406,16 +2424,17 @@
 
 [[package]]
 name = "time-core"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7300fbefb4dadc1af235a9cef3737cea692a9d97e1b9cbcd4ebdae6f8868e6fb"
+checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
 
 [[package]]
 name = "time-macros"
-version = "0.2.12"
+version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75c65469ed6b3a4809d987a41eb1dc918e9bc1d92211cbad7ae82931846f7451"
+checksum = "7ba3a3ef41e6672a2f0f001392bb5dcd3ff0a9992d618ca761a11c3121547774"
 dependencies = [
+ "num-conv",
  "time-core",
 ]
 
@@ -2469,7 +2488,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -2673,7 +2692,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.15",
+ "syn 2.0.51",
 ]
 
 [[package]]
diff --git a/shared/comm-lib/Cargo.lock b/shared/comm-lib/Cargo.lock
--- a/shared/comm-lib/Cargo.lock
+++ b/shared/comm-lib/Cargo.lock
@@ -80,7 +80,7 @@
 checksum = "e01ed3140b2f8d422c68afa1ed2e85d996ea619c988ac834d255db32138655cb"
 dependencies = [
  "quote",
- "syn 2.0.29",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -389,7 +389,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -400,7 +400,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -1376,6 +1376,7 @@
 dependencies = [
  "derive_more",
  "prost",
+ "serde",
  "tonic",
  "tonic-build",
  "tracing",
@@ -2068,9 +2069,9 @@
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.66"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
+checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
 dependencies = [
  "unicode-ident",
 ]
@@ -2131,9 +2132,9 @@
 
 [[package]]
 name = "quote"
-version = "1.0.32"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50f3b39ccfb720540debaa0164757101c08ecb8d326b15358ce76a62c7e85965"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
 dependencies = [
  "proc-macro2",
 ]
@@ -2439,22 +2440,22 @@
 
 [[package]]
 name = "serde"
-version = "1.0.147"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d193d69bae983fc11a79df82342761dfbf28a99fc8d203dca4c3c1b590948965"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.147"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4f1d362ca8fc9c3e3a7484440752472d68a6caa98f1ab81d99b5dfe517cec852"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 1.0.109",
+ "syn 2.0.51",
 ]
 
 [[package]]
@@ -2595,9 +2596,9 @@
 
 [[package]]
 name = "syn"
-version = "2.0.29"
+version = "2.0.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c324c494eba9d92503e6f1ef2e6df781e78f6a7705a0202d9801b198807d518a"
+checksum = "6ab617d94515e94ae53b8406c628598680aa0c9587474ecbe58188f7b345d66c"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2720,7 +2721,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.29",
+ "syn 2.0.51",
 ]
 
 [[package]]
diff --git a/shared/comm-opaque2/Cargo.lock b/shared/comm-opaque2/Cargo.lock
--- a/shared/comm-opaque2/Cargo.lock
+++ b/shared/comm-opaque2/Cargo.lock
@@ -87,6 +87,7 @@
  "log",
  "opaque-ke",
  "rand",
+ "serde",
  "tonic",
  "wasm-bindgen",
 ]
@@ -158,7 +159,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -189,7 +190,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -407,7 +408,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -430,18 +431,18 @@
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.52"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d0e1ae9e836cc3beddd63db0df682593d7e2d3d891ae8c9083d2113e1744224"
+checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.26"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4424af4bf778aae2051a77b60283332f386554255d722233d09fbfc7e30da2fc"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
 dependencies = [
  "proc-macro2",
 ]
@@ -491,22 +492,22 @@
 
 [[package]]
 name = "serde"
-version = "1.0.156"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "314b5b092c0ade17c00142951e50ced110ec27cea304b1037c6969246c2469a4"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.156"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7e29c4601e36bcec74a223228dce795f4cd3616341a4af93520ca1a837c087d"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.50",
 ]
 
 [[package]]
@@ -537,6 +538,17 @@
  "unicode-ident",
 ]
 
+[[package]]
+name = "syn"
+version = "2.0.50"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74f1bdc9872430ce9b75da68329d1c1746faf50ffac5f19e02b71e37ff881ffb"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "synstructure"
 version = "0.12.6"
@@ -545,7 +557,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
  "unicode-xid",
 ]
 
@@ -623,7 +635,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
 ]
 
 [[package]]
@@ -705,7 +717,7 @@
  "once_cell",
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
  "wasm-bindgen-shared",
 ]
 
@@ -727,7 +739,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -821,6 +833,6 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 1.0.109",
  "synstructure",
 ]
diff --git a/shared/comm-opaque2/Cargo.toml b/shared/comm-opaque2/Cargo.toml
--- a/shared/comm-opaque2/Cargo.toml
+++ b/shared/comm-opaque2/Cargo.toml
@@ -10,3 +10,4 @@
 rand = "0.8"
 tonic = { version = "0.9.1", default-features = false }
 wasm-bindgen = "0.2"
+serde = { version = "1.0.197", features = ["derive"] }
diff --git a/shared/comm-opaque2/src/server/login.rs b/shared/comm-opaque2/src/server/login.rs
--- a/shared/comm-opaque2/src/server/login.rs
+++ b/shared/comm-opaque2/src/server/login.rs
@@ -4,12 +4,14 @@
   ServerLoginStartParameters, ServerSetup,
 };
 use rand::rngs::OsRng;
+use serde::{Deserialize, Serialize};
 
 use crate::Cipher;
 
-#[derive(Clone)]
+#[derive(Clone, Serialize, Deserialize, Debug)]
 pub struct Login {
   state: Option<ServerLogin<Cipher>>,
+  #[serde(default = "OsRng::default", skip)]
   rng: OsRng,
   pub session_key: Option<Vec<u8>>,
 }
diff --git a/shared/grpc_clients/Cargo.lock b/shared/grpc_clients/Cargo.lock
--- a/shared/grpc_clients/Cargo.lock
+++ b/shared/grpc_clients/Cargo.lock
@@ -51,7 +51,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.50",
 ]
 
 [[package]]
@@ -62,7 +62,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.50",
 ]
 
 [[package]]
@@ -302,6 +302,7 @@
 dependencies = [
  "derive_more",
  "prost",
+ "serde",
  "tonic",
  "tonic-build",
  "tracing",
@@ -584,7 +585,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.50",
 ]
 
 [[package]]
@@ -617,9 +618,9 @@
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.66"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
+checksum = "e2422ad645d89c99f8f3e6b88a9fdeca7fabeac836b1002371c4367c8f984aae"
 dependencies = [
  "unicode-ident",
 ]
@@ -680,9 +681,9 @@
 
 [[package]]
 name = "quote"
-version = "1.0.32"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50f3b39ccfb720540debaa0164757101c08ecb8d326b15358ce76a62c7e85965"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
 dependencies = [
  "proc-macro2",
 ]
@@ -878,9 +879,23 @@
 
 [[package]]
 name = "serde"
-version = "1.0.183"
+version = "1.0.197"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32ac8da02677876d532745a130fc9d8e6edfa81a269b107c5b00829b91d8eb3c"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.50",
+]
 
 [[package]]
 name = "sharded-slab"
@@ -945,9 +960,9 @@
 
 [[package]]
 name = "syn"
-version = "2.0.28"
+version = "2.0.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04361975b3f5e348b2189d8dc55bc942f278b2d482a6a0365de5bdd62d351567"
+checksum = "74f1bdc9872430ce9b75da68329d1c1746faf50ffac5f19e02b71e37ff881ffb"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1017,7 +1032,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.50",
 ]
 
 [[package]]
@@ -1152,7 +1167,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.50",
 ]
 
 [[package]]
@@ -1254,7 +1269,7 @@
  "once_cell",
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.50",
  "wasm-bindgen-shared",
 ]
 
@@ -1276,7 +1291,7 @@
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.28",
+ "syn 2.0.50",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
diff --git a/shared/grpc_clients/Cargo.toml b/shared/grpc_clients/Cargo.toml
--- a/shared/grpc_clients/Cargo.toml
+++ b/shared/grpc_clients/Cargo.toml
@@ -9,6 +9,7 @@
 tonic = { version = "0.9.1", features = ["tls-webpki-roots"] }
 tracing = "0.1"
 tracing-subscriber = { version = "0.3.16", features = ["env-filter"] }
+serde = { version = "1.0", features = ["derive"] }
 
 [build-dependencies]
 tonic-build = "0.9.1"
diff --git a/shared/grpc_clients/src/identity/device.rs b/shared/grpc_clients/src/identity/device.rs
--- a/shared/grpc_clients/src/identity/device.rs
+++ b/shared/grpc_clients/src/identity/device.rs
@@ -3,6 +3,8 @@
 use crate::error::Error;
 pub use crate::identity::protos::unauth::DeviceType;
 
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
 impl TryFrom<i32> for DeviceType {
   type Error = crate::error::Error;
 
@@ -32,6 +34,41 @@
   }
 }
 
+impl Serialize for DeviceType {
+  fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+  where
+    S: Serializer,
+  {
+    let value = match self {
+      DeviceType::Keyserver => 0,
+      DeviceType::Web => 1,
+      DeviceType::Ios => 2,
+      DeviceType::Android => 3,
+      DeviceType::Windows => 4,
+      DeviceType::MacOs => 5,
+    };
+    serializer.serialize_i32(value)
+  }
+}
+
+impl<'de> Deserialize<'de> for DeviceType {
+  fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+  where
+    D: Deserializer<'de>,
+  {
+    let value = i32::deserialize(deserializer)?;
+    match value {
+      0 => Ok(DeviceType::Keyserver),
+      1 => Ok(DeviceType::Web),
+      2 => Ok(DeviceType::Ios),
+      3 => Ok(DeviceType::Android),
+      4 => Ok(DeviceType::Windows),
+      5 => Ok(DeviceType::MacOs),
+      _ => Err(serde::de::Error::custom("Invalid DeviceType value")),
+    }
+  }
+}
+
 #[cfg(test)]
 mod device_tests {
   use super::*;