diff --git a/README.md b/README.md
index 1f0c4b4..3a55aa1 100755
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ print iptables firewall rules to allow 1 nodes in netdb through firewall includi
 
 ### keygen
 
-Generate an i2p private key
+Generate an I2P private key
 
 #### Usage
 
@@ -76,6 +76,9 @@ or
 | EDDSA-SHA512-ED25519                 | 7      |
 | GOSTR3410_CRYPTO_PRO_A-GOSTR3411-256 | 9      |
 | GOSTR3410_TC26_A_512-GOSTR3411-512   | 10     |
+| RED25519-SHA512                      | 11     |
+
+For more information on the types of signatures, see the [documentation](https://i2pd.readthedocs.io/en/latest/user-guide/tunnels/#signature-types).
 
 ### vain
 
@@ -88,17 +91,17 @@ Vanity generation address.
 #### Time to Generate on a 2.70GHz Processor
 | characters| time to generate (approx.) |
 | -------------------- | --------------- |
-|         1 	       | ~0.082s	 |
-|         2	       | ~0.075s	 |
-|         3	       | ~0.100s	 |
-|         4	       | ~0.394s	 |
-|         5	       | ~6.343s	 |
-|         6	       | ~1m-5m	 	 |
-|         7	       | ~30m	 	 |
+|         1 	       | ~0.082s	     |
+|         2	           | ~0.075s	     |
+|         3	           | ~0.100s	     |
+|         4	           | ~0.394s	     |
+|         5	           | ~6.343s	     |
+|         6	           | ~1m-5m	 	     |
+|         7	           | ~30m	 	     |
 
 ### keyinfo
 
-Prints information about an i2p private key
+Prints information about an I2P private key
 
 #### Usage
 
diff --git a/keygen.cpp b/keygen.cpp
index 9105d92..81d184c 100644
--- a/keygen.cpp
+++ b/keygen.cpp
@@ -17,6 +17,7 @@ int main (int argc, char * argv[])
 	if (argc > 2) {
 		std::string str(argv[2]);
 		type = NameToSigType(str);
+		if (SigTypeToName(type).find("unknown") != std::string::npos) { std::cerr << "Incorrect signature type" << std::endl; return -2; }
 	}
 	auto keys = i2p::data::PrivateKeys::CreateRandomKeys (type);
 	std::ofstream f (argv[1], std::ofstream::binary | std::ofstream::out);
@@ -28,6 +29,7 @@ int main (int argc, char * argv[])
 		f.write ((char *)buf, len);
 		delete[] buf;
 		std::cout << "Destination " << keys.GetPublic ()->GetIdentHash ().ToBase32 () << " created" << std::endl;
+		std::cout << "Signature type: " << SigTypeToName(type) << " (" << type << ")" << std::endl;
 	}
 	else
 		std::cout << "Can't create file " << argv[1] << std::endl;
diff --git a/vanitygen.cpp b/vanitygen.cpp
index 982d09d..5030ec1 100644
--- a/vanitygen.cpp
+++ b/vanitygen.cpp
@@ -1,6 +1,7 @@
 #include "vanity.hpp"
-#include<regex>
-#include<getopt.h>
+#include <regex>
+#include <mutex>
+#include <getopt.h>
 
 
 static struct
@@ -10,8 +11,17 @@ static struct
 	i2p::data::SigningKeyType signature;
 	std::string outputpath="";
 	std::regex regex;
+	bool sig_type = true;
 } options;
 
+void check_sig_type()
+{
+	if (SigTypeToName(options.signature).find("unknown") != std::string::npos)
+	{
+		std::cerr << "Incorrect signature type" << std::endl;
+		options.sig_type = false;
+	}
+}
 
 static void inline CalculateW (const uint8_t block[64], uint32_t W[64])
 {
@@ -124,6 +134,7 @@ static inline bool NotThat(const char * a, const char *b)
 	return false;
 }
 
+std::mutex mtx;
 static inline bool thread_find(uint8_t * buf, const char * prefix, int id_thread, unsigned long long throughput)
 {
 /**
@@ -131,7 +142,9 @@ static inline bool thread_find(uint8_t * buf, const char * prefix, int id_thread
  * For idea and example ^-^
  * Orignal is sensei of crypto ;)
  */
+	mtx.lock();
 	std::cout << "Thread " << id_thread << " binded" << std::endl;
+	mtx.unlock();
 /*
 	union
 	{
@@ -187,7 +200,7 @@ static inline bool thread_find(uint8_t * buf, const char * prefix, int id_thread
 		// if(result)
 		{
 			ByteStreamToBase32 ((uint8_t*)hash, 32, addr, 52);
-			std::cout << "Address found " << addr << " in " << id_thread << std::endl;
+			std::cout << "Address found " << addr << std::endl;
 			found=true;
 			FoundNonce=*nonce;
 			// free(hash);
@@ -210,13 +223,11 @@ static inline bool thread_find(uint8_t * buf, const char * prefix, int id_thread
 
 void usage(void){
 	const constexpr char * help="vain [text-pattern|regex-pattern] [options]\n"
-	"-h --help, help menu\n"
-	"-r --reg,  regexp instead just text pattern (e.g. '(one|two).*')\n"
-	"--threads -t, (default count of system)\n"
-	"--signature -s, (signature type)\n"
-	"-o --output output file (default private.dat)\n"
-	"--usage usage\n"
-	// "--prefix -p\n"
+	"-h --help    help menu\n"
+	"-r --reg     regexp instead just text pattern (e.g. '(one|two).*')\n"
+	"-t --threads (default count of system)\n"
+//	"--signature -s, (signature type)\n" NOT IMPLEMENTED FUCKING PLAZ!
+	"-o --output  output file (default private.dat)\n"
 	"";
 	puts(help);
 }
@@ -253,6 +264,7 @@ void parsing(int argc, char ** args){
 				break;
 			case 's':
 				options.signature = NameToSigType(std::string(optarg));
+				check_sig_type();
 				break;
 			case 'o':
 				options.outputpath=optarg;
@@ -302,6 +314,7 @@ int main (int argc, char * argv[])
 ///////////////
 
 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+	if (!options.sig_type) return -2;
 	auto keys = i2p::data::PrivateKeys::CreateRandomKeys (options.signature);
 	switch(options.signature)
 	{
@@ -311,7 +324,7 @@ int main (int argc, char * argv[])
 		case i2p::data::SIGNING_KEY_TYPE_RSA_SHA384_3072:
 		case i2p::data::SIGNING_KEY_TYPE_RSA_SHA512_4096:
 		case i2p::data::SIGNING_KEY_TYPE_GOSTR3410_TC26_A_512_GOSTR3411_512:
-		std::cout << "Sorry, i don't can generate address for this signature type" << std::endl;
+		std::cout << "Sorry, I don't can generate address for this signature type" << std::endl;
 		return 0;
 		break;
 	}