diff --git a/Gost.cpp b/Gost.cpp
index b142dbb3..b68e2397 100644
--- a/Gost.cpp
+++ b/Gost.cpp
@@ -107,22 +107,6 @@ namespace crypto
 				"1",
 				"8D91E471E0989CDA27DF505A453F2B7635294F2DDF23E3B122ACC99C9E9F1E14"
 			}, // A
-			{
-				"8000000000000000000000000000000000000000000000000000000000000C96",
- 				"3E1AF419A269A5F866A7D3C25C3DF80AE979259373FF2B182F49D4CE7E1BBC8B",
- 				"8000000000000000000000000000000000000000000000000000000000000C99",
- 				"800000000000000000000000000000015F700CFFF1A624E5E497161BCC8A198F",
-				"1",
-				"3FA8124359F96680B83D1C3EB2C070E5C545C9858D03ECFB744BF8D717717EFC"
-			}, // B	
-			{
-				"9B9F605F5A858107AB1EC85E6B41C8AACF846E86789051D37998F7B9022D7598",
- 				"805A",
- 				"9B9F605F5A858107AB1EC85E6B41C8AACF846E86789051D37998F7B9022D759B",
- 				"9B9F605F5A858107AB1EC85E6B41C8AA582CA3511EDDFB74F02F3A6598980BB9",
- 				"0",
-				"41ECE55743711A8C3CBF3783CD08C0EE4D4DC440D4641A8F366E550DFDB3BB67"
-			}, // C
 			{
 				"C2173F1513981673AF4892C23035A27CE25E2013BF95AA33B22C656F277E7335",
 				"295F9BAE7428ED9CCC20E7C359A9D41A22FCCD9108E17BF7BA9337A6F8AE9513",
@@ -137,16 +121,8 @@ namespace crypto
 				"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFDC7",
 				"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF27E69532F48D89116FF22B8D4E0560609B4B38ABFAD2B85DCACDB1411F10B275",
 				"3",
-				"7503CFE87A836AE3A61B8816E25450E6CE5E1C93ACF1ABC1778064FDCBEFA921DF1626BE4FD036E93D75E6A50E3A41E98028FE5FC235F5B889A589CB5215F2A"		
-			}, // tc26-2012-paramSetA-512
-			{
-				"DC9203E514A721875485A529D2C722FB187BC8980EB866644DE41C68E143064546E861C0E2C9EDD92ADE71F46FCF50FF2AD97F951FDA9F2A2EB6546F39689BD3",
-				"B4C4EE28CEBC6C2C8AC12952CF37F16AC7EFB6A9F69F4B57FFDA2E4F0DE5ADE038CBC2FFF719D2C18DE0284B8BFEF3B52B8CC7A5F5BF0A3C8D2319A5312557E1",	
-				"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFDC7",
-				"3FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC98CDBA46506AB004C33A9FF5147502CC8EDA9E7A769A12694623CEF47F023ED",
-				"E2E31EDFC23DE7BDEBE241CE593EF5DE2295B7A9CBAEF021D385F7074CEA043AA27272A7AE602BF2A7B9033DB9ED3610C6FB85487EAE97AAC5BC7928C1950148",
-				"F5CE40D95B5EB899ABBCCFF5911CB8577939804D6527378B8C108C3D2090FF9BE18E2D33E3021ED27EF32D85822423B6304F726AA854BAE07D0396E9A9ADDC40F"	
-			} // tc26-2012-paramSetC-256
+				"7503CFE87A836AE3A61B8816E25450E6CE5E1C93ACF1ABC1778064FDCBEFA921DF1626BE4FD036E93D75E6A50E3A41E98028FE5FC235F5B889A589CB5215F2A4"		
+			} // tc26-2012-paramSetA-512
 		};	
 		
 		BIGNUM * a = nullptr, * b = nullptr, * p = nullptr, * q =nullptr, * x = nullptr, * y = nullptr;
diff --git a/Gost.h b/Gost.h
index 39a57bb2..84ac82d1 100644
--- a/Gost.h
+++ b/Gost.h
@@ -15,15 +15,12 @@ namespace crypto
 	{
 		// GOST R 34.10-2001
 		eGOSTR3410CryptoProA = 0,   // 1.2.643.2.2.35.1
-		eGOSTR3410CryptoProB,	    // 1.2.643.2.2.35.2
-		eGOSTR3410CryptoProC,	    // 1.2.643.2.2.35.3
 		// XchA = A, XchB = C
 		//eGOSTR3410CryptoProXchA,    // 1.2.643.2.2.36.0
 		//eGOSTR3410CryptoProXchB,	// 1.2.643.2.2.36.1
 		// GOST R 34.10-2012		
 		eGOSTR3410TC26A256,		// 1.2.643.7.1.2.1.1.1 
 		eGOSTR3410TC26A512,		// 1.2.643.7.1.2.1.2.1
-		eGOSTR3410TC26C512,		// 1.2.643.7.1.2.1.2.3 
 		eGOSTR3410NumParamSets
 	};	
 	
diff --git a/Identity.cpp b/Identity.cpp
index 4c05be24..b5b72c43 100644
--- a/Identity.cpp
+++ b/Identity.cpp
@@ -111,7 +111,7 @@ namespace data
 					memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::GOSTR3410_256_PUBLIC_KEY_LENGTH);
 					break;
 				}
-				case SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_C_512_GOSTR3411:	
+				case SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_A_512_GOSTR3411:	
 				{	
 					// 512
 					// no padding, key length is 128
@@ -398,10 +398,10 @@ namespace data
 				UpdateVerifier (new i2p::crypto::GOSTR3410_2012_256_Verifier (i2p::crypto::eGOSTR3410TC26A256, m_StandardIdentity.signingKey + padding));
 				break;
 			}	
-			case SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_C_512_GOSTR3411:
+			case SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_A_512_GOSTR3411:
 			{	
 				// zero padding
-				UpdateVerifier (new i2p::crypto::GOSTR3410_2012_512_Verifier (i2p::crypto::eGOSTR3410TC26C512, m_StandardIdentity.signingKey));
+				UpdateVerifier (new i2p::crypto::GOSTR3410_2012_512_Verifier (i2p::crypto::eGOSTR3410TC26A512, m_StandardIdentity.signingKey));
 				break;
 			}	
 			default:
@@ -551,8 +551,8 @@ namespace data
 			case SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_A_256_GOSTR3411:
 				m_Signer.reset (new i2p::crypto::GOSTR3410_2012_256_Signer (i2p::crypto::eGOSTR3410TC26A256, m_SigningPrivateKey));
 			break;		
-			case SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_C_512_GOSTR3411:
-				m_Signer.reset (new i2p::crypto::GOSTR3410_2012_512_Signer (i2p::crypto::eGOSTR3410TC26C512, m_SigningPrivateKey));
+			case SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_A_512_GOSTR3411:
+				m_Signer.reset (new i2p::crypto::GOSTR3410_2012_512_Signer (i2p::crypto::eGOSTR3410TC26A512, m_SigningPrivateKey));
 			break;		
 			default:
 				LogPrint (eLogError, "Identity: Signing key type ", (int)m_Public->GetSigningKeyType (), " is not supported");
@@ -595,8 +595,8 @@ namespace data
 				case SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_A_256_GOSTR3411:
 					i2p::crypto::CreateGOSTR3410RandomKeys (i2p::crypto::eGOSTR3410TC26A256, keys.m_SigningPrivateKey, signingPublicKey);
 				break;	
-				case SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_C_512_GOSTR3411:
-					i2p::crypto::CreateGOSTR3410RandomKeys (i2p::crypto::eGOSTR3410TC26C512, keys.m_SigningPrivateKey, signingPublicKey);
+				case SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_A_512_GOSTR3411:
+					i2p::crypto::CreateGOSTR3410RandomKeys (i2p::crypto::eGOSTR3410TC26A512, keys.m_SigningPrivateKey, signingPublicKey);
 				break;		
 				default:
 					LogPrint (eLogError, "Identity: Signing key type ", (int)type, " is not supported. Create DSA-SHA1");
diff --git a/Identity.h b/Identity.h
index 5751d567..1c3c8c18 100644
--- a/Identity.h
+++ b/Identity.h
@@ -63,7 +63,7 @@ namespace data
 	// following signature type should never appear in netid=2
 	const uint16_t SIGNING_KEY_TYPE_GOSTR3410_2001_CRYPTO_PRO_A_GOSTR3411 = 65280; // approved by FSB
 	const uint16_t SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_A_256_GOSTR3411 = 65281;
-	const uint16_t SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_C_512_GOSTR3411 = 65282;
+	const uint16_t SIGNING_KEY_TYPE_GOSTR3410_2012_TC26_A_512_GOSTR3411 = 65282;
 	
 	typedef uint16_t SigningKeyType;
 	typedef uint16_t CryptoKeyType;