diff --git a/Cargo.lock b/Cargo.lock
index 7757ce3..cecd9bc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -179,6 +179,12 @@ dependencies = [
  "syn 2.0.60",
 ]
 
+[[package]]
+name = "asn1_der"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "155a5a185e42c6b77ac7b88a15143d930a9e9727a5b7b77eed417404ab15c247"
+
 [[package]]
 name = "async-io"
 version = "2.3.3"
@@ -346,6 +352,12 @@ version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4cbbc9d0964165b47557570cce6c952866c2678457aca742aafc9fb771d30270"
 
+[[package]]
+name = "base64"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
+
 [[package]]
 name = "base64"
 version = "0.22.1"
@@ -376,7 +388,16 @@ version = "0.10.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46502ad458c9a52b69d4d4d32775c788b7a1b85e8bc9d482d92250fc0e3f8efe"
 dependencies = [
- "digest",
+ "digest 0.10.7",
+]
+
+[[package]]
+name = "block-buffer"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4152116fd6e9dadb291ae18fc1ec3575ed6d84c29642d97890f4b4a3417297e4"
+dependencies = [
+ "generic-array",
 ]
 
 [[package]]
@@ -550,6 +571,12 @@ version = "0.8.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "22ec99545bb0ed0ea7bb9b8e1e9122ea386ff8a48c0922e43f36d45ab09e0e80"
 
+[[package]]
+name = "crunchy"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
+
 [[package]]
 name = "crypto-common"
 version = "0.1.6"
@@ -561,6 +588,16 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "crypto-mac"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b584a330336237c1eecd3e94266efb216c56ed91225d634cb2991c5f3fd1aeab"
+dependencies = [
+ "generic-array",
+ "subtle",
+]
+
 [[package]]
 name = "ctr"
 version = "0.9.2"
@@ -579,7 +616,7 @@ dependencies = [
  "cfg-if",
  "cpufeatures",
  "curve25519-dalek-derive",
- "digest",
+ "digest 0.10.7",
  "fiat-crypto",
  "platforms",
  "rustc_version",
@@ -680,13 +717,22 @@ dependencies = [
  "powerfmt",
 ]
 
+[[package]]
+name = "digest"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
- "block-buffer",
+ "block-buffer 0.10.4",
  "crypto-common",
  "subtle",
 ]
@@ -728,7 +774,7 @@ dependencies = [
  "ed25519",
  "rand_core",
  "serde",
- "sha2",
+ "sha2 0.10.8",
  "subtle",
  "zeroize",
 ]
@@ -1133,7 +1179,17 @@ version = "0.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b5f8eb2ad728638ea2c7d47a21db23b7b58a72ed6a38256b8a1849f15fbbdf7"
 dependencies = [
- "hmac",
+ "hmac 0.12.1",
+]
+
+[[package]]
+name = "hmac"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "126888268dcc288495a26bf004b38c5fdbb31682f992c84ceb046a1f0fe38840"
+dependencies = [
+ "crypto-mac",
+ "digest 0.9.0",
 ]
 
 [[package]]
@@ -1142,7 +1198,18 @@ version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
 dependencies = [
- "digest",
+ "digest 0.10.7",
+]
+
+[[package]]
+name = "hmac-drbg"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "17ea0a1394df5b6574da6e0c1ade9e78868c9fb0a4e5ef4428e32da4676b85b1"
+dependencies = [
+ "digest 0.9.0",
+ "generic-array",
+ "hmac 0.8.1",
 ]
 
 [[package]]
@@ -1593,13 +1660,15 @@ version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "55cca1eb2bc1fd29f099f3daaab7effd01e1a54b7c577d0ed082521034d912e8"
 dependencies = [
+ "asn1_der",
  "bs58",
  "ed25519-dalek",
  "hkdf",
+ "libsecp256k1",
  "multihash",
  "quick-protobuf",
  "rand",
- "sha2",
+ "sha2 0.10.8",
  "thiserror",
  "tracing",
  "zeroize",
@@ -1659,7 +1728,7 @@ dependencies = [
  "once_cell",
  "quick-protobuf",
  "rand",
- "sha2",
+ "sha2 0.10.8",
  "snow",
  "static_assertions",
  "thiserror",
@@ -1840,6 +1909,54 @@ dependencies = [
  "yamux 0.13.3",
 ]
 
+[[package]]
+name = "libsecp256k1"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "95b09eff1b35ed3b33b877ced3a691fc7a481919c7e29c53c906226fcf55e2a1"
+dependencies = [
+ "arrayref",
+ "base64 0.13.1",
+ "digest 0.9.0",
+ "hmac-drbg",
+ "libsecp256k1-core",
+ "libsecp256k1-gen-ecmult",
+ "libsecp256k1-gen-genmult",
+ "rand",
+ "serde",
+ "sha2 0.9.9",
+ "typenum",
+]
+
+[[package]]
+name = "libsecp256k1-core"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5be9b9bb642d8522a44d533eab56c16c738301965504753b03ad1de3425d5451"
+dependencies = [
+ "crunchy",
+ "digest 0.9.0",
+ "subtle",
+]
+
+[[package]]
+name = "libsecp256k1-gen-ecmult"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3038c808c55c87e8a172643a7d87187fc6c4174468159cb3090659d55bcb4809"
+dependencies = [
+ "libsecp256k1-core",
+]
+
+[[package]]
+name = "libsecp256k1-gen-genmult"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3db8d6ba2cec9eacc40e6e8ccc98931840301f1006e95647ceb2dd5c3aa06f7c"
+dependencies = [
+ "libsecp256k1-core",
+]
+
 [[package]]
 name = "linked-hash-map"
 version = "0.5.6"
@@ -2230,7 +2347,7 @@ version = "3.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e459365e590736a54c3fa561947c84837534b8e9af6fc5bf781307e82658fae"
 dependencies = [
- "base64",
+ "base64 0.22.1",
  "serde",
 ]
 
@@ -2628,7 +2745,7 @@ version = "0.12.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c7d6d2a27d57148378eb5e111173f4276ad26340ecc5c49a4a2152167a2d6a37"
 dependencies = [
- "base64",
+ "base64 0.22.1",
  "bytes",
  "futures-core",
  "futures-util",
@@ -2791,7 +2908,7 @@ version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "196fe16b00e106300d3e45ecfcb764fa292a535d7326a29a5875c579c7417425"
 dependencies = [
- "base64",
+ "base64 0.22.1",
  "rustls-pki-types",
 ]
 
@@ -2901,6 +3018,19 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.9.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d58a1e1bf39749807d89cf2d98ac2dfa0ff1cb3faa38fbb64dd88ac8013d800"
+dependencies = [
+ "block-buffer 0.9.0",
+ "cfg-if",
+ "cpufeatures",
+ "digest 0.9.0",
+ "opaque-debug",
+]
+
 [[package]]
 name = "sha2"
 version = "0.10.8"
@@ -2909,7 +3039,7 @@ checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
 dependencies = [
  "cfg-if",
  "cpufeatures",
- "digest",
+ "digest 0.10.7",
 ]
 
 [[package]]
@@ -2958,7 +3088,7 @@ dependencies = [
  "rand_core",
  "ring 0.17.8",
  "rustc_version",
- "sha2",
+ "sha2 0.10.8",
  "subtle",
 ]
 
@@ -3237,7 +3367,7 @@ dependencies = [
  "async-stream",
  "async-trait",
  "axum",
- "base64",
+ "base64 0.22.1",
  "bytes",
  "h2 0.4.5",
  "http 1.1.0",
@@ -3277,7 +3407,7 @@ version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8dc0e36ac436560b9a8c9edad4521cf5dd5deb1af591936db9660191b6ecf619"
 dependencies = [
- "base64",
+ "base64 0.22.1",
  "bytes",
  "http 1.1.0",
  "http-body 1.0.1",
diff --git a/Cargo.toml b/Cargo.toml
index 1f3bcf9..cec89f6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ async-trait = "0.1.81"
 clap = "4.5.4"
 futures = "0.3.30"
 hex = "0.4.3"
-libp2p = { version = "0.53.2", features = ["tokio", "macros", "yamux", "noise", "tcp", "request-response", "relay"] }
+libp2p = { version = "0.53.2", features = ["tokio", "macros", "yamux", "noise", "tcp", "request-response", "relay", "secp256k1"] }
 prost = "0.13.1"
 reqwest = { version = "0.12.5", features = ["json", "rustls-tls"], default-features = false }
 serde = { version = "1.0.207", features = ["derive"] }
diff --git a/src/main.rs b/src/main.rs
index 7b2872c..aff11de 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -27,7 +27,7 @@ fn parse_args() -> Command {
                 .long("key")
                 .num_args(1)
                 .action(ArgAction::Set)
-                .help("Ed25519 key. If not set, a random key will be generated"),
+                .help("Secp256k1 key. If not set, a random key will be generated"),
         )
         .arg(
             Arg::new("SERVER_ADDR")
@@ -118,12 +118,12 @@ async fn serve(args: &ArgMatches) {
     let key = args
         .get_one::<String>("KEY")
         .map(|key| {
-            identity::ed25519::SecretKey::try_from_bytes(hex::decode(key).expect("Invalid key"))
+            identity::secp256k1::SecretKey::try_from_bytes(hex::decode(key).expect("Invalid key"))
                 .expect("Invalid key")
         })
         .unwrap_or_else(|| {
-            let key = identity::ed25519::SecretKey::generate();
-            println!("Generated key: {}", hex::encode(&key));
+            let key = identity::secp256k1::SecretKey::generate();
+            println!("Generated key: {}", hex::encode(key.to_bytes()));
             key
         });
     let server_addr = args
@@ -147,7 +147,7 @@ async fn serve(args: &ArgMatches) {
     println!("commander_server_addr: {}", commander_server_addr);
 
     let (pproxy, pproxy_handle) = PProxy::new(
-        identity::ed25519::Keypair::from(key).into(),
+        identity::secp256k1::Keypair::from(key).into(),
         server_addr,
         proxy_addr,
         access_server_endpoint,