diff --git a/native/cpp/CommonCpp/NativeModules/CommCoreModule.h b/native/cpp/CommonCpp/NativeModules/CommCoreModule.h
--- a/native/cpp/CommonCpp/NativeModules/CommCoreModule.h
+++ b/native/cpp/CommonCpp/NativeModules/CommCoreModule.h
@@ -104,6 +104,8 @@
   encrypt(jsi::Runtime &rt, jsi::String message, jsi::String deviceID) override;
   virtual jsi::Value
   decrypt(jsi::Runtime &rt, jsi::String message, jsi::String deviceID) override;
+  virtual jsi::Value
+  signMessage(jsi::Runtime &rt, jsi::String message) override;
   virtual void terminate(jsi::Runtime &rt) override;
   virtual double getCodeVersion(jsi::Runtime &rt) override;
   virtual jsi::Value
diff --git a/native/cpp/CommonCpp/NativeModules/CommCoreModule.cpp b/native/cpp/CommonCpp/NativeModules/CommCoreModule.cpp
--- a/native/cpp/CommonCpp/NativeModules/CommCoreModule.cpp
+++ b/native/cpp/CommonCpp/NativeModules/CommCoreModule.cpp
@@ -1015,6 +1015,33 @@
       });
 }
 
+jsi::Value CommCoreModule::signMessage(jsi::Runtime &rt, jsi::String message) {
+  std::string messageStr = message.utf8(rt);
+  return createPromiseAsJSIValue(
+      rt, [=](jsi::Runtime &innerRt, std::shared_ptr<Promise> promise) {
+        taskType job = [=, &innerRt]() {
+          std::string error;
+          std::string signature;
+          try {
+            signature = this->cryptoModule->signMessage(messageStr);
+          } catch (const std::exception &e) {
+            error = "signing message failed with: " + std::string(e.what());
+          }
+
+          this->jsInvoker_->invokeAsync([=, &innerRt]() {
+            if (error.size()) {
+              promise->reject(error);
+              return;
+            }
+
+            auto jsiSignature{jsi::String::createFromUtf8(innerRt, signature)};
+            promise->resolve(std::move(jsiSignature));
+          });
+        };
+        this->cryptoThread->scheduleTask(job);
+      });
+}
+
 CommCoreModule::CommCoreModule(
     std::shared_ptr<facebook::react::CallInvoker> jsInvoker)
     : facebook::react::CommCoreModuleSchemaCxxSpecJSI(jsInvoker),
@@ -1459,5 +1486,4 @@
         ::restoreBackup(rust::string(backupSecretStr), currentID);
       });
 }
-
 } // namespace comm
diff --git a/native/cpp/CommonCpp/_generated/commJSI-generated.cpp b/native/cpp/CommonCpp/_generated/commJSI-generated.cpp
--- a/native/cpp/CommonCpp/_generated/commJSI-generated.cpp
+++ b/native/cpp/CommonCpp/_generated/commJSI-generated.cpp
@@ -96,6 +96,9 @@
 static jsi::Value __hostFunction_CommCoreModuleSchemaCxxSpecJSI_decrypt(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<CommCoreModuleSchemaCxxSpecJSI *>(&turboModule)->decrypt(rt, args[0].asString(rt), args[1].asString(rt));
 }
+static jsi::Value __hostFunction_CommCoreModuleSchemaCxxSpecJSI_signMessage(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
+  return static_cast<CommCoreModuleSchemaCxxSpecJSI *>(&turboModule)->signMessage(rt, args[0].asString(rt));
+}
 static jsi::Value __hostFunction_CommCoreModuleSchemaCxxSpecJSI_getCodeVersion(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<CommCoreModuleSchemaCxxSpecJSI *>(&turboModule)->getCodeVersion(rt);
 }
@@ -187,6 +190,7 @@
   methodMap_["initializeContentInboundSession"] = MethodMetadata {3, __hostFunction_CommCoreModuleSchemaCxxSpecJSI_initializeContentInboundSession};
   methodMap_["encrypt"] = MethodMetadata {2, __hostFunction_CommCoreModuleSchemaCxxSpecJSI_encrypt};
   methodMap_["decrypt"] = MethodMetadata {2, __hostFunction_CommCoreModuleSchemaCxxSpecJSI_decrypt};
+  methodMap_["signMessage"] = MethodMetadata {1, __hostFunction_CommCoreModuleSchemaCxxSpecJSI_signMessage};
   methodMap_["getCodeVersion"] = MethodMetadata {0, __hostFunction_CommCoreModuleSchemaCxxSpecJSI_getCodeVersion};
   methodMap_["terminate"] = MethodMetadata {0, __hostFunction_CommCoreModuleSchemaCxxSpecJSI_terminate};
   methodMap_["setNotifyToken"] = MethodMetadata {1, __hostFunction_CommCoreModuleSchemaCxxSpecJSI_setNotifyToken};
diff --git a/native/cpp/CommonCpp/_generated/commJSI.h b/native/cpp/CommonCpp/_generated/commJSI.h
--- a/native/cpp/CommonCpp/_generated/commJSI.h
+++ b/native/cpp/CommonCpp/_generated/commJSI.h
@@ -47,6 +47,7 @@
   virtual jsi::Value initializeContentInboundSession(jsi::Runtime &rt, jsi::String identityKeys, jsi::String encryptedMessage, jsi::String deviceID) = 0;
   virtual jsi::Value encrypt(jsi::Runtime &rt, jsi::String message, jsi::String deviceID) = 0;
   virtual jsi::Value decrypt(jsi::Runtime &rt, jsi::String message, jsi::String deviceID) = 0;
+  virtual jsi::Value signMessage(jsi::Runtime &rt, jsi::String message) = 0;
   virtual double getCodeVersion(jsi::Runtime &rt) = 0;
   virtual void terminate(jsi::Runtime &rt) = 0;
   virtual jsi::Value setNotifyToken(jsi::Runtime &rt, jsi::String token) = 0;
@@ -303,6 +304,14 @@
       return bridging::callFromJs<jsi::Value>(
           rt, &T::decrypt, jsInvoker_, instance_, std::move(message), std::move(deviceID));
     }
+    jsi::Value signMessage(jsi::Runtime &rt, jsi::String message) override {
+      static_assert(
+          bridging::getParameterCount(&T::signMessage) == 2,
+          "Expected signMessage(...) to have 2 parameters");
+
+      return bridging::callFromJs<jsi::Value>(
+          rt, &T::signMessage, jsInvoker_, instance_, std::move(message));
+    }
     double getCodeVersion(jsi::Runtime &rt) override {
       static_assert(
           bridging::getParameterCount(&T::getCodeVersion) == 1,
diff --git a/native/schema/CommCoreModuleSchema.js b/native/schema/CommCoreModuleSchema.js
--- a/native/schema/CommCoreModuleSchema.js
+++ b/native/schema/CommCoreModuleSchema.js
@@ -113,6 +113,7 @@
   ) => Promise<string>;
   +encrypt: (message: string, deviceID: string) => Promise<string>;
   +decrypt: (message: string, deviceID: string) => Promise<string>;
+  +signMessage: (message: string) => Promise<string>;
   +getCodeVersion: () => number;
   +terminate: () => void;
   +setNotifyToken: (token: string) => Promise<void>;