diff --git a/i2psam.cpp b/i2psam.cpp
index 17d981c..c83bb31 100644
--- a/i2psam.cpp
+++ b/i2psam.cpp
@@ -241,7 +241,8 @@ StreamSession::StreamSession(
         const std::string& SAMHost     /*= SAM_DEFAULT_ADDRESS*/,
               uint16_t     SAMPort     /*= SAM_DEFAULT_PORT*/,
         const std::string& destination /*= SAM_GENERATE_MY_DESTINATION*/,
-        const std::string& i2pOptions  /*= SAM_DEFAULT_I2P_OPTIONS*/)
+        const std::string& i2pOptions  /*= SAM_DEFAULT_I2P_OPTIONS*/,
+        const std::string& signatureType /*= SAM_SIGNATURE_TYPE */ )
     : socket_(SAMHost, SAMPort)
     , nickname_(nickname)
     , sessionID_(generateSessionID())
@@ -419,7 +420,7 @@ FullDestination StreamSession::createStreamSession(const std::string& destinatio
 {
     typedef Message::Answer<const std::string> AnswerType;
 
-    const AnswerType answer = createStreamSession(socket_, sessionID_, nickname_, destination, i2pOptions_);
+    const AnswerType answer = createStreamSession(socket_, sessionID_, nickname_, destination, i2pOptions_, SAM_SIGNATURE_TYPE);
     if (answer.status != Message::OK)
     {
         fallSick();
@@ -486,9 +487,9 @@ Message::eStatus StreamSession::request(I2pSocket& socket, const std::string& re
 }
 
 /*static*/
-Message::Answer<const std::string> StreamSession::createStreamSession(I2pSocket& socket, const std::string& sessionID, const std::string& nickname, const std::string& destination, const std::string& options)
+Message::Answer<const std::string> StreamSession::createStreamSession(I2pSocket& socket, const std::string& sessionID, const std::string& nickname, const std::string& destination, const std::string& options, const std::string& signatureType)
 {
-    return request(socket, Message::sessionCreate(Message::sssStream, sessionID, nickname, destination, options), "DESTINATION");
+    return request(socket, Message::sessionCreate(Message::sssStream, sessionID, nickname, destination, options, signatureType), "DESTINATION");
 }
 
 /*static*/
@@ -649,7 +650,7 @@ std::string Message::hello(const std::string &minVer, const std::string &maxVer)
     return createSAMRequest(helloFormat, minVer.c_str(), maxVer.c_str());
 }
 
-std::string Message::sessionCreate(SessionStyle style, const std::string& sessionID, const std::string& nickname, const std::string& destination /*= SAM_GENERATE_MY_DESTINATION*/, const std::string& options /*= ""*/)
+std::string Message::sessionCreate(SessionStyle style, const std::string& sessionID, const std::string& nickname, const std::string& destination /*= SAM_GENERATE_MY_DESTINATION*/, const std::string& options /*= ""*/, const std::string& signatureType /*= SAM_SIGNATURE_TYPE*/)
 {
 ///////////////////////////////////////////////////////////
 //
@@ -673,8 +674,8 @@ std::string Message::sessionCreate(SessionStyle style, const std::string& sessio
     case sssRaw:      sessionStyle = "RAW";      break;
     }
 
-    static const char* sessionCreateFormat = "SESSION CREATE STYLE=%s ID=%s DESTINATION=%s inbound.nickname=%s %s\n";  // we add inbound.nickname option
-    return createSAMRequest(sessionCreateFormat, sessionStyle.c_str(), sessionID.c_str(), destination.c_str(), nickname.c_str(), options.c_str());
+    static const char* sessionCreateFormat = "SESSION CREATE STYLE=%s ID=%s DESTINATION=%s SIGNATURE_TYPE=%s inbound.nickname=%s %s\n";  // we add inbound.nickname option
+    return createSAMRequest(sessionCreateFormat, sessionStyle.c_str(), sessionID.c_str(), destination.c_str(), signatureType.c_str(), nickname.c_str(), options.c_str());
 }
 
 std::string Message::streamAccept(const std::string& sessionID, bool silent /*= false*/)
diff --git a/i2psam.h b/i2psam.h
index 8a081d2..b46686f 100644
--- a/i2psam.h
+++ b/i2psam.h
@@ -21,6 +21,7 @@
 #define SAM_GENERATE_MY_DESTINATION "TRANSIENT"
 #define SAM_MY_NAME                 "ME"
 #define SAM_DEFAULT_I2P_OPTIONS     ""
+#define SAM_SIGNATURE_TYPE "ECDSA_SHA256_P256"
 
 #define SAM_NAME_INBOUND_QUANTITY           "inbound.quantity"
 #define SAM_DEFAULT_INBOUND_QUANTITY        3 // Three tunnels is default now
@@ -182,7 +183,9 @@ public:
     };
 
     static std::string hello(const std::string& minVer, const std::string& maxVer);
-    static std::string sessionCreate(SessionStyle style, const std::string& sessionID, const std::string& nickname, const std::string& destination = SAM_GENERATE_MY_DESTINATION, const std::string& options = "");
+    static std::string sessionCreate(SessionStyle style, const std::string& sessionID,
+                                      const std::string& nickname, const std::string& destination = SAM_GENERATE_MY_DESTINATION,
+                                      const std::string& options = "", const std::string& signatureType = SAM_SIGNATURE_TYPE);
     static std::string streamAccept(const std::string& sessionID, bool silent = false);
     static std::string streamConnect(const std::string& sessionID, const std::string& destination, bool silent = false);
     static std::string streamForward(const std::string& sessionID, const std::string& host, uint16_t port, bool silent = false);
@@ -328,7 +331,8 @@ public:
             const std::string& SAMHost     = SAM_DEFAULT_ADDRESS,
                   uint16_t     SAMPort     = SAM_DEFAULT_PORT,
             const std::string& destination = SAM_GENERATE_MY_DESTINATION,
-            const std::string& i2pOptions  = SAM_DEFAULT_I2P_OPTIONS);
+            const std::string& i2pOptions  = SAM_DEFAULT_I2P_OPTIONS,
+            const std::string& signatureType = SAM_SIGNATURE_TYPE);
     explicit StreamSession(StreamSession& rhs);
     ~StreamSession();
 
@@ -389,7 +393,7 @@ private:
     static Message::Answer<const std::string> request(I2pSocket& socket, const std::string& requestStr, const std::string& keyOnSuccess);
     static Message::eStatus request(I2pSocket& socket, const std::string& requestStr);
     // commands
-    static Message::Answer<const std::string> createStreamSession(I2pSocket& socket, const std::string& sessionID, const std::string& nickname, const std::string& destination, const std::string& options);
+    static Message::Answer<const std::string> createStreamSession(I2pSocket& socket, const std::string& sessionID, const std::string& nickname, const std::string& destination, const std::string& options, const std::string& signatureType);
     static Message::Answer<const std::string> namingLookup(I2pSocket& socket, const std::string& name);
     static Message::Answer<const FullDestination> destGenerate(I2pSocket& socket);