diff --git a/native/cpp/CommonCpp/grpc/grpc_client/Cargo.lock b/native/cpp/CommonCpp/grpc/grpc_client/Cargo.lock
--- a/native/cpp/CommonCpp/grpc/grpc_client/Cargo.lock
+++ b/native/cpp/CommonCpp/grpc/grpc_client/Cargo.lock
@@ -2,33 +2,6 @@
 # It is not intended for manual editing.
 version = 3
 
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-
 [[package]]
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@@ -37,9 +10,9 @@
 
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 dependencies = [
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@@ -78,303 +51,12 @@
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@@ -749,7 +286,7 @@
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 checksum = "f2fb860ca6fafa5552fb6d0e816a69c8e49f0908bf524e30a90d97c85892d506"
 dependencies = [
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+ "block-buffer 0.10.3",
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@@ -765,39 +302,12 @@
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@@ -807,16 +317,6 @@
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@@ -829,16 +329,6 @@
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-]
-
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@@ -884,11 +363,9 @@
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- "futures-macro",
  "futures-task",
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  "pin-utils",
- "slab",
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 [[package]]
@@ -918,39 +395,29 @@
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-dependencies = [
- "ff",
- "rand_core 0.6.3",
- "subtle",
+ "cfg-if",
+ "libc",
+ "wasi 0.11.0+wasi-snapshot-preview1",
 ]
 
 [[package]]
 name = "grpc_client"
 version = "0.1.0"
 dependencies = [
+ "argon2",
+ "curve25519-dalek",
  "cxx",
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- "identity",
+ "digest 0.9.0",
  "lazy_static",
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- "prost 0.11.0",
+ "prost",
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+ "sha2",
  "tokio",
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- "tonic 0.8.0",
- "tonic-build 0.8.0",
+ "tonic",
+ "tonic-build",
  "tracing",
 ]
 
@@ -969,7 +436,7 @@
  "indexmap",
  "slab",
  "tokio",
- "tokio-util 0.7.3",
+ "tokio-util",
  "tracing",
 ]
 
@@ -979,15 +446,6 @@
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-]
-
 [[package]]
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@@ -1003,12 +461,6 @@
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-[[package]]
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-
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@@ -1093,23 +545,6 @@
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-[[package]]
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- "hyper",
- "log",
- "rustls",
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- "tokio",
- "tokio-rustls",
- "webpki",
-]
-
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@@ -1122,48 +557,6 @@
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-[[package]]
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-dependencies = [
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- "js-sys",
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- "winapi",
-]
-
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- "bytes",
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- "curve25519-dalek",
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- "siwe",
- "tokio",
- "tokio-stream",
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- "tonic-build 0.6.2",
- "tracing",
- "tracing-subscriber",
-]
-
 [[package]]
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@@ -1183,15 +576,6 @@
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-[[package]]
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-dependencies = [
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-
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@@ -1207,33 +591,6 @@
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-[[package]]
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-
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- "elliptic-curve",
- "sha3",
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-
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-
 [[package]]
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@@ -1264,12 +621,6 @@
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-[[package]]
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-
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@@ -1288,12 +639,6 @@
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-
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@@ -1312,35 +657,6 @@
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-[[package]]
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- "minimal-lexical",
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-
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-
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-dependencies = [
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-
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@@ -1351,15 +667,6 @@
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-[[package]]
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-]
-
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@@ -1378,12 +685,11 @@
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 dependencies = [
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+ "constant_time_eq",
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  "generic-array",
- "getrandom 0.2.7",
  "hkdf",
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@@ -1391,23 +697,11 @@
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 ]
 
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-
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-
 [[package]]
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+checksum = "7676374caaee8a325c9e7a2ae557f216c5563a171d6997b0ef8a65af35147700"
 dependencies = [
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@@ -1478,30 +772,6 @@
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- "version_check",
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-
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- "quote",
- "version_check",
-]
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@@ -1511,16 +781,6 @@
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-dependencies = [
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-
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@@ -1528,27 +788,7 @@
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-
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- "multimap",
- "petgraph",
- "prost 0.9.0",
- "prost-types 0.9.0",
- "regex",
- "tempfile",
- "which",
+ "prost-derive",
 ]
 
 [[package]]
@@ -1558,32 +798,19 @@
 checksum = "d49d928704208aba2cb1fb022ce1a319bdedcb03caf51ddf82734fa903407762"
 dependencies = [
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- "heck 0.4.0",
+ "heck",
  "itertools",
  "lazy_static",
  "log",
  "multimap",
  "petgraph",
- "prost 0.11.0",
- "prost-types 0.11.0",
+ "prost",
+ "prost-types",
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-[[package]]
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- "quote",
- "syn",
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-
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@@ -1597,16 +824,6 @@
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-[[package]]
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-dependencies = [
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- "prost 0.9.0",
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-
 [[package]]
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@@ -1614,7 +831,7 @@
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 dependencies = [
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- "prost 0.11.0",
+ "prost",
 ]
 
 [[package]]
@@ -1634,181 +851,75 @@
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- "rand_core 0.6.3",
-]
-
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+ "rand_core 0.6.3",
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 dependencies = [
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+ "ppv-lite86",
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-name = "security-framework-sys"
-version = "2.6.1"
+name = "remove_dir_all"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0160a13a177a45bfb43ce71c01580998474f556ad854dcbca936dd2841a5c556"
+checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
 dependencies = [
- "core-foundation-sys",
- "libc",
+ "winapi",
 ]
 
 [[package]]
-name = "semver"
-version = "1.0.13"
+name = "scratch"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93f6841e709003d68bb2deee8c343572bf446003ec20a583e76f7b15cebf3711"
+checksum = "96311ef4a16462c757bb6a39152c40f58f31cd2602a40fceb937e2bc34e6cbab"
 
 [[package]]
 name = "serde"
@@ -1829,53 +940,6 @@
  "opaque-debug",
 ]
 
-[[package]]
-name = "sha3"
-version = "0.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f81199417d4e5de3f04b1e871023acea7389672c4135918f05aa9cbf2f2fa809"
-dependencies = [
- "block-buffer 0.9.0",
- "digest 0.9.0",
- "keccak",
- "opaque-debug",
-]
-
-[[package]]
-name = "sharded-slab"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "900fba806f70c630b0a382d0d825e17a0f19fcd059a2ade1ff237bcddf446b31"
-dependencies = [
- "lazy_static",
-]
-
-[[package]]
-name = "signature"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2807892cfa58e081aa1f1111391c7a0649d4fa127a4ffbe34bcbfb35a1171a4"
-dependencies = [
- "digest 0.9.0",
- "rand_core 0.6.3",
-]
-
-[[package]]
-name = "siwe"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86f2d8ae2d4ae58df46e173aa496562ea857ac6a4f0d435ed30fcd19da0aaa79"
-dependencies = [
- "chrono",
- "hex",
- "http",
- "iri-string",
- "k256",
- "rand",
- "sha3",
- "thiserror",
-]
-
 [[package]]
 name = "slab"
 version = "0.4.7"
@@ -1885,12 +949,6 @@
  "autocfg",
 ]
 
-[[package]]
-name = "smallvec"
-version = "1.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2fd0db749597d91ff862fd1d55ea87f7855a744a8425a64695b6fca237d1dad1"
-
 [[package]]
 name = "socket2"
 version = "0.4.4"
@@ -1901,18 +959,6 @@
  "winapi",
 ]
 
-[[package]]
-name = "spin"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
-
-[[package]]
-name = "strsim"
-version = "0.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
-
 [[package]]
 name = "subtle"
 version = "2.4.1"
@@ -1971,62 +1017,6 @@
  "winapi-util",
 ]
 
-[[package]]
-name = "textwrap"
-version = "0.15.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1141d4d61095b28419e22cb0bbf02755f5e54e0526f97f1e3d1d160e60885fb"
-
-[[package]]
-name = "thiserror"
-version = "1.0.32"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5f6586b7f764adc0231f4c79be7b920e766bb2f3e51b3661cdb263828f19994"
-dependencies = [
- "thiserror-impl",
-]
-
-[[package]]
-name = "thiserror-impl"
-version = "1.0.32"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12bafc5b54507e0149cdf1b145a5d80ab80a90bcd9275df43d4fff68460f6c21"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
-[[package]]
-name = "thread_local"
-version = "1.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5516c27b78311c50bf42c071425c560ac799b11c30b31f87e3081965fe5e0180"
-dependencies = [
- "once_cell",
-]
-
-[[package]]
-name = "time"
-version = "0.1.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
-dependencies = [
- "libc",
- "wasi 0.10.0+wasi-snapshot-preview1",
- "winapi",
-]
-
-[[package]]
-name = "time"
-version = "0.3.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db76ff9fa4b1458b3c7f077f3ff9887394058460d21e634355b273aaf11eea45"
-dependencies = [
- "libc",
- "num_threads",
-]
-
 [[package]]
 name = "tokio"
 version = "1.20.1"
@@ -2067,17 +1057,6 @@
  "syn",
 ]
 
-[[package]]
-name = "tokio-rustls"
-version = "0.22.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc6844de72e57df1980054b38be3a9f4702aba4858be64dd700181a8a6d0e1b6"
-dependencies = [
- "rustls",
- "tokio",
- "webpki",
-]
-
 [[package]]
 name = "tokio-stream"
 version = "0.1.9"
@@ -2089,20 +1068,6 @@
  "tokio",
 ]
 
-[[package]]
-name = "tokio-util"
-version = "0.6.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36943ee01a6d67977dd3f84a5a1d2efeb4ada3a1ae771cadfaa535d9d9fc6507"
-dependencies = [
- "bytes",
- "futures-core",
- "futures-sink",
- "log",
- "pin-project-lite",
- "tokio",
-]
-
 [[package]]
 name = "tokio-util"
 version = "0.7.3"
@@ -2117,37 +1082,6 @@
  "tracing",
 ]
 
-[[package]]
-name = "tonic"
-version = "0.6.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ff08f4649d10a70ffa3522ca559031285d8e421d727ac85c60825761818f5d0a"
-dependencies = [
- "async-stream",
- "async-trait",
- "base64",
- "bytes",
- "futures-core",
- "futures-util",
- "h2",
- "http",
- "http-body",
- "hyper",
- "hyper-timeout",
- "percent-encoding",
- "pin-project",
- "prost 0.9.0",
- "prost-derive 0.9.0",
- "tokio",
- "tokio-stream",
- "tokio-util 0.6.10",
- "tower",
- "tower-layer",
- "tower-service",
- "tracing",
- "tracing-futures",
-]
-
 [[package]]
 name = "tonic"
 version = "0.8.0"
@@ -2168,11 +1102,11 @@
  "hyper-timeout",
  "percent-encoding",
  "pin-project",
- "prost 0.11.0",
- "prost-derive 0.11.0",
+ "prost",
+ "prost-derive",
  "tokio",
  "tokio-stream",
- "tokio-util 0.7.3",
+ "tokio-util",
  "tower",
  "tower-layer",
  "tower-service",
@@ -2180,18 +1114,6 @@
  "tracing-futures",
 ]
 
-[[package]]
-name = "tonic-build"
-version = "0.6.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9403f1bafde247186684b230dc6f38b5cd514584e8bec1dd32514be4745fa757"
-dependencies = [
- "proc-macro2",
- "prost-build 0.9.0",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "tonic-build"
 version = "0.8.0"
@@ -2200,7 +1122,7 @@
 dependencies = [
  "prettyplease",
  "proc-macro2",
- "prost-build 0.11.0",
+ "prost-build",
  "quote",
  "syn",
 ]
@@ -2219,7 +1141,7 @@
  "rand",
  "slab",
  "tokio",
- "tokio-util 0.7.3",
+ "tokio-util",
  "tower-layer",
  "tower-service",
  "tracing",
@@ -2287,7 +1209,6 @@
 checksum = "7b7358be39f2f274f322d2aaed611acc57f382e8eb1e5b48cb9ae30933495ce7"
 dependencies = [
  "once_cell",
- "valuable",
 ]
 
 [[package]]
@@ -2300,31 +1221,6 @@
  "tracing",
 ]
 
-[[package]]
-name = "tracing-log"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "78ddad33d2d10b1ed7eb9d1f518a5674713876e97e5bb9b7345a7984fbb4f922"
-dependencies = [
- "lazy_static",
- "log",
- "tracing-core",
-]
-
-[[package]]
-name = "tracing-subscriber"
-version = "0.3.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60db860322da191b40952ad9affe65ea23e7dd6a5c442c2c42865810c6ab8e6b"
-dependencies = [
- "ansi_term",
- "sharded-slab",
- "smallvec",
- "thread_local",
- "tracing-core",
- "tracing-log",
-]
-
 [[package]]
 name = "try-lock"
 version = "0.2.3"
@@ -2343,12 +1239,6 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "15c61ba63f9235225a22310255a29b806b907c9b8c964bcbd0a2c70f3f2deea7"
 
-[[package]]
-name = "unicode-segmentation"
-version = "1.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e8820f5d777f6224dc4be3632222971ac30164d4a258d595640799554ebfd99"
-
 [[package]]
 name = "unicode-width"
 version = "0.1.9"
@@ -2361,24 +1251,6 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "957e51f3646910546462e67d5f7599b9e4fb8acdd304b087a6494730f9eebf04"
 
-[[package]]
-name = "untrusted"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
-
-[[package]]
-name = "urlencoding"
-version = "2.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68b90931029ab9b034b300b797048cf23723400aa757e8a2bfb9d748102f9821"
-
-[[package]]
-name = "valuable"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
-
 [[package]]
 name = "version_check"
 version = "0.9.4"
@@ -2401,92 +1273,12 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
-[[package]]
-name = "wasi"
-version = "0.10.0+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
-
 [[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 = "0.2.82"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc7652e3f6c4706c8d9cd54832c4a4ccb9b5336e2c3bd154d5cccfbf1c1f5f7d"
-dependencies = [
- "cfg-if",
- "wasm-bindgen-macro",
-]
-
-[[package]]
-name = "wasm-bindgen-backend"
-version = "0.2.82"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "662cd44805586bd52971b9586b1df85cdbbd9112e4ef4d8f41559c334dc6ac3f"
-dependencies = [
- "bumpalo",
- "log",
- "once_cell",
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-macro"
-version = "0.2.82"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b260f13d3012071dfb1512849c033b1925038373aea48ced3012c09df952c602"
-dependencies = [
- "quote",
- "wasm-bindgen-macro-support",
-]
-
-[[package]]
-name = "wasm-bindgen-macro-support"
-version = "0.2.82"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5be8e654bdd9b79216c2929ab90721aa82faf65c48cdf08bdc4e7f51357b80da"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
- "wasm-bindgen-backend",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-shared"
-version = "0.2.82"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6598dd0bd3c7d51095ff6531a5b23e02acdc81804e30d8f07afb77b7215a140a"
-
-[[package]]
-name = "web-sys"
-version = "0.3.59"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed055ab27f941423197eb86b2035720b1a3ce40504df082cac2ecc6ed73335a1"
-dependencies = [
- "js-sys",
- "wasm-bindgen",
-]
-
-[[package]]
-name = "webpki"
-version = "0.21.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8e38c0608262c46d4a56202ebabdeb094cef7e560ca7a226c6bf055188aa4ea"
-dependencies = [
- "ring",
- "untrusted",
-]
-
 [[package]]
 name = "which"
 version = "4.2.5"
@@ -2572,12 +1364,6 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"
 
-[[package]]
-name = "xmlparser"
-version = "0.13.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "114ba2b24d2167ef6d67d7d04c8cc86522b87f490025f39f0303b7db5bf5e3d8"
-
 [[package]]
 name = "zeroize"
 version = "1.4.3"
diff --git a/native/cpp/CommonCpp/grpc/grpc_client/Cargo.toml b/native/cpp/CommonCpp/grpc/grpc_client/Cargo.toml
--- a/native/cpp/CommonCpp/grpc/grpc_client/Cargo.toml
+++ b/native/cpp/CommonCpp/grpc/grpc_client/Cargo.toml
@@ -16,7 +16,10 @@
 rand = "0.8"
 opaque-ke = "1.2"
 tracing = "0.1"
-identity = {path = "../../../../../services/identity" }
+argon2 = "0.4"
+digest = "0.9"
+curve25519-dalek = "3.2"
+sha2 = "0.9"
 
 [build-dependencies]
 cxx-build = "1.0"
diff --git a/native/cpp/CommonCpp/grpc/grpc_client/src/lib.rs b/native/cpp/CommonCpp/grpc/grpc_client/src/lib.rs
--- a/native/cpp/CommonCpp/grpc/grpc_client/src/lib.rs
+++ b/native/cpp/CommonCpp/grpc/grpc_client/src/lib.rs
@@ -13,7 +13,8 @@
 use tonic::{transport::Channel, Request, Status};
 use tracing::{error, instrument};
 
-use ::identity::Cipher;
+mod opaque;
+use opaque::Cipher;
 
 use crate::identity::{
   identity_service_client::IdentityServiceClient,
diff --git a/native/cpp/CommonCpp/grpc/grpc_client/src/opaque.rs b/native/cpp/CommonCpp/grpc/grpc_client/src/opaque.rs
new file mode 100644
--- /dev/null
+++ b/native/cpp/CommonCpp/grpc/grpc_client/src/opaque.rs
@@ -0,0 +1,30 @@
+use argon2::Argon2;
+use digest::{generic_array::GenericArray, Digest};
+use opaque_ke::{
+  ciphersuite::CipherSuite, errors::InternalPakeError, hash::Hash,
+  slow_hash::SlowHash,
+};
+
+pub struct Cipher;
+
+impl CipherSuite for Cipher {
+  type Group = curve25519_dalek::ristretto::RistrettoPoint;
+  type KeyExchange = opaque_ke::key_exchange::tripledh::TripleDH;
+  type Hash = sha2::Sha512;
+  type SlowHash = ArgonWrapper;
+}
+
+pub struct ArgonWrapper(Argon2<'static>);
+
+impl<D: Hash> SlowHash<D> for ArgonWrapper {
+  fn hash(
+    input: GenericArray<u8, <D as Digest>::OutputSize>,
+  ) -> Result<Vec<u8>, InternalPakeError> {
+    let params = Argon2::default();
+    let mut output = vec![0u8; <D as Digest>::output_size()];
+    params
+      .hash_password_into(&input, &[0; argon2::MIN_SALT_LEN], &mut output)
+      .map_err(|_| InternalPakeError::SlowHashError)?;
+    Ok(output)
+  }
+}