diff --git a/engine/common/host.c b/engine/common/host.c
index d324da3a..0e02b0e9 100644
--- a/engine/common/host.c
+++ b/engine/common/host.c
@@ -768,6 +768,7 @@ void Host_InitCommon( int argc, char **argv, const char *progname, qboolean bCha
 		progname++;
 
 	Q_strncpy( SI.exeName, progname, sizeof( SI.exeName ));
+	Q_strncpy( SI.basedirName, progname, sizeof( SI.exeName ));
 
 	if( Host_IsDedicated() )
 	{
@@ -888,6 +889,8 @@ int EXPORT Host_Main( int argc, char **argv, const char *progname, int bChangeGa
 	SV_Init();
 	CL_Init();
 
+	ID_Init();
+
 	if( host.type == HOST_DEDICATED )
 	{
 #ifdef _WIN32
diff --git a/engine/common/identification.c b/engine/common/identification.c
new file mode 100644
index 00000000..792a9786
--- /dev/null
+++ b/engine/common/identification.c
@@ -0,0 +1,713 @@
+/*
+identification.c - unique id generation
+Copyright (C) 2017 mittorn
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+*/
+
+#include "common.h"
+#include <fcntl.h>
+#ifndef _WIN32
+#include <dirent.h>
+#endif
+static char id_md5[33];
+static char id_customid[MAX_STRING];
+
+/*
+==========================================================
+
+simple 64-bit one-hash-func bloom filter
+should be enough to determine if device exist in identifier
+
+==========================================================
+*/
+typedef integer64 bloomfilter_t;
+
+static bloomfilter_t id;
+
+#define bf64_mask ((1U<<6)-1)
+
+bloomfilter_t BloomFilter_Process( const char *buffer, int size )
+{
+	dword crc32;
+	bloomfilter_t value = 0;
+
+	if( size <= 0 || size > 512 )
+		return 0;
+
+	CRC32_Init( &crc32 );
+	CRC32_ProcessBuffer( &crc32, buffer, size );
+
+	while( crc32 )
+	{
+		value |= ((integer64)1) << ( crc32 & bf64_mask );
+		crc32 = crc32 >> 6;
+	}
+
+	return value;
+}
+
+bloomfilter_t BloomFilter_ProcessStr( const char *buffer )
+{
+	return BloomFilter_Process( buffer, Q_strlen( buffer ) );
+}
+
+uint BloomFilter_Weight( bloomfilter_t value )
+{
+	int weight = 0;
+
+	while( value )
+	{
+		if( value & 1 )
+			weight++;
+		value = value >> 1;
+#if _MSC_VER == 1200
+		value &= 0x7FFFFFFFFFFFFFFF;
+#endif
+	}
+
+	return weight;
+}
+
+qboolean BloomFilter_ContainsString( bloomfilter_t filter, const char *str )
+{
+	bloomfilter_t value = BloomFilter_ProcessStr( str );
+
+	return (filter & value) == value;
+}
+
+/*
+=============================================
+
+IDENTIFICATION
+
+=============================================
+*/
+#define MAXBITS_GEN 30
+#define MAXBITS_CHECK MAXBITS_GEN + 6
+
+qboolean ID_ProcessFile( bloomfilter_t *value, const char *path );
+
+void ID_BloomFilter_f( void )
+{
+	bloomfilter_t value = 0;
+	int i;
+
+	for( i = 1; i < Cmd_Argc(); i++ )
+		value |= BloomFilter_ProcessStr( Cmd_Argv( i ) );
+
+	Msg( "%d %016llX\n", BloomFilter_Weight( value ), value );
+
+	// test
+	// for( i = 1; i < Cmd_Argc(); i++ )
+	//	Msg( "%s: %d\n", Cmd_Argv( i ), BloomFilter_ContainsString( value, Cmd_Argv( i ) ) );
+}
+
+qboolean ID_VerifyHEX( const char *hex )
+{
+	uint chars = 0;
+	char prev = 0;
+	qboolean monotonic = true; // detect 11:22...
+	int weight = 0;
+
+	while( *hex++ )
+	{
+		char ch = Q_tolower( *hex );
+
+		if( ( ch >= 'a' && ch <= 'f') || ( ch >= '0' && ch <= '9' ) )
+		{
+			if( prev && ( ch - prev < -1 || ch - prev > 1 ) )
+				monotonic = false;
+
+			if( ch >= 'a' )
+				chars |= 1 << (ch - 'a' + 10);
+			else
+				chars |= 1 << (ch - '0');
+
+			prev = ch;
+		}
+	}
+
+	if( monotonic )
+		return false;
+
+	while( chars )
+	{
+		if( chars & 1 )
+			weight++;
+
+		chars = chars >> 1;
+
+		if( weight > 2 )
+			return true;
+	}
+
+	return false;
+}
+
+void ID_VerifyHEX_f( void )
+{
+	if( ID_VerifyHEX( Cmd_Argv( 1 ) ) )
+		Msg( "Good\n" );
+	else
+		Msg( "Bad\n" );
+}
+
+#ifdef __linux__
+
+qboolean ID_ProcessCPUInfo( bloomfilter_t *value )
+{
+	int cpuinfofd = open( "/proc/cpuinfo", O_RDONLY );
+	char buffer[1024], *pbuf, *pbuf2;
+	int ret;
+
+	if( cpuinfofd < 0 )
+		return false;
+
+	if( (ret = read( cpuinfofd, buffer, 1023 ) ) < 0 )
+		return false;
+
+	close( cpuinfofd );
+
+	buffer[ret] = 0;
+
+	if( !ret )
+		return false;
+
+	pbuf = Q_strstr( buffer, "Serial" );
+	if( !pbuf )
+		return false;
+	pbuf += 6;
+
+	if( ( pbuf2 = Q_strchr( pbuf, '\n' ) ) )
+		*pbuf2 = 0;
+	else
+		pbuf2 = pbuf + Q_strlen( pbuf );
+
+	if( !ID_VerifyHEX( pbuf ) )
+		return false;
+
+	*value |= BloomFilter_Process( pbuf, pbuf2 - pbuf );
+	return true;
+}
+
+qboolean ID_ValidateNetDevice( const char *dev )
+{
+	const char *prefix = "/sys/class/net";
+	byte *pfile;
+	int assignType;
+
+	// These devices are fake, their mac address is generated each boot, while assign_type is 0
+	if( Q_strnicmp( dev, "ccmni", sizeof( "ccmni" ) ) ||
+		Q_strnicmp( dev, "ifb", sizeof( "ifb" ) ) )
+		return false;
+
+	pfile = FS_LoadDirectFile( va( "%s/%s/addr_assign_type", prefix, dev ), NULL );
+
+	// if NULL, it may be old kernel
+	if( pfile )
+	{
+		assignType = Q_atoi( (char*)pfile );
+
+		Mem_Free( pfile );
+
+		// check is MAC address is constant
+		if( assignType != 0 )
+			return false;
+	}
+
+	return true;
+}
+
+int ID_ProcessNetDevices( bloomfilter_t *value )
+{
+	const char *prefix = "/sys/class/net";
+	DIR *dir;
+	struct dirent *entry;
+	int count = 0;
+
+	if( !( dir = opendir( prefix ) ) )
+		return 0;
+
+	while( ( entry = readdir( dir ) ) && BloomFilter_Weight( *value ) < MAXBITS_GEN )
+	{
+		if( !Q_strcmp( entry->d_name, "." ) || !Q_strcmp( entry->d_name, ".." ) )
+			continue;
+
+		if( !ID_ValidateNetDevice( entry->d_name ) )
+			continue;
+
+		count += ID_ProcessFile( value, va( "%s/%s/address", prefix, entry->d_name ) );
+	}
+	closedir( dir );
+	return count;
+}
+
+int ID_CheckNetDevices( bloomfilter_t value )
+{
+	const char *prefix = "/sys/class/net";
+
+	DIR *dir;
+	struct dirent *entry;
+	int count = 0;
+	bloomfilter_t filter = 0;
+
+	if( !( dir = opendir( prefix ) ) )
+		return 0;
+
+	while( ( entry = readdir( dir ) ) )
+	{
+		if( !Q_strcmp( entry->d_name, "." ) || !Q_strcmp( entry->d_name, ".." ) )
+			continue;
+
+		if( !ID_ValidateNetDevice( entry->d_name ) )
+			continue;
+
+		if( ID_ProcessFile( &filter, va( "%s/%s/address", prefix, entry->d_name ) ) )
+			count += ( value & filter ) == filter, filter = 0;
+	}
+
+	closedir( dir );
+	return count;
+}
+
+void ID_TestCPUInfo_f( void )
+{
+	bloomfilter_t value = 0;
+
+	if( ID_ProcessCPUInfo( &value ) )
+		Msg( "Got %016llX\n", value );
+	else
+		Msg( "Could not get serial\n" );
+}
+
+#endif
+
+qboolean ID_ProcessFile( bloomfilter_t *value, const char *path )
+{
+	int fd = open( path, O_RDONLY );
+	char buffer[256];
+	int ret;
+
+	if( fd < 0 )
+		return false;
+
+	if( (ret = read( fd, buffer, 255 ) ) < 0 )
+		return false;
+
+	close( fd );
+
+	if( !ret )
+		return false;
+
+	buffer[ret] = 0;
+
+	if( !ID_VerifyHEX( buffer ) )
+		return false;
+
+	*value |= BloomFilter_Process( buffer, ret );
+	return true;
+}
+
+#ifndef _WIN32
+int ID_ProcessFiles( bloomfilter_t *value, const char *prefix, const char *postfix )
+{
+	DIR *dir;
+	struct dirent *entry;
+	int count = 0;
+
+	if( !( dir = opendir( prefix ) ) )
+	    return 0;
+
+	while( ( entry = readdir( dir ) ) && BloomFilter_Weight( *value ) < MAXBITS_GEN )
+	{
+		if( !Q_strcmp( entry->d_name, "." ) || !Q_strcmp( entry->d_name, ".." ) )
+			continue;
+
+		count += ID_ProcessFile( value, va( "%s/%s/%s", prefix, entry->d_name, postfix ) );
+	}
+	closedir( dir );
+	return count;
+}
+
+int ID_CheckFiles( bloomfilter_t value, const char *prefix, const char *postfix )
+{
+	DIR *dir;
+	struct dirent *entry;
+	int count = 0;
+	bloomfilter_t filter = 0;
+
+	if( !( dir = opendir( prefix ) ) )
+	    return 0;
+
+	while( ( entry = readdir( dir ) ) )
+	{
+		if( !Q_strcmp( entry->d_name, "." ) || !Q_strcmp( entry->d_name, ".." ) )
+			continue;
+
+		if( ID_ProcessFile( &filter, va( "%s/%s/%s", prefix, entry->d_name, postfix ) ) )
+			count += ( value & filter ) == filter, filter = 0;
+	}
+
+	closedir( dir );
+	return count;
+}
+#else
+int ID_GetKeyData( HKEY hRootKey, char *subKey, char *value, LPBYTE data, DWORD cbData )
+{
+	HKEY hKey;
+
+	if( RegOpenKeyEx( hRootKey, subKey, 0, KEY_QUERY_VALUE, &hKey ) != ERROR_SUCCESS )
+		return 0;
+	
+	if( RegQueryValueEx( hKey, value, NULL, NULL, data, &cbData ) != ERROR_SUCCESS )
+	{
+		RegCloseKey( hKey );
+		return 0;
+	}
+
+	RegCloseKey( hKey );
+	return 1;
+}
+int ID_SetKeyData( HKEY hRootKey, char *subKey, DWORD dwType, char *value, LPBYTE data, DWORD cbData)
+{
+	HKEY hKey;
+	if( RegCreateKey( hRootKey, subKey, &hKey ) != ERROR_SUCCESS )
+		return 0;
+	
+	if( RegSetValueEx( hKey, value, 0, dwType, data, cbData ) != ERROR_SUCCESS )
+	{
+		RegCloseKey( hKey );
+		return 0;
+	}
+	
+	RegCloseKey( hKey );
+	return 1;
+}
+
+#define BUFSIZE 4096
+
+int ID_RunWMIC(char *buffer, const char *cmdline)
+{
+	HANDLE g_IN_Rd = NULL;
+	HANDLE g_IN_Wr = NULL;
+	HANDLE g_OUT_Rd = NULL;
+	HANDLE g_OUT_Wr = NULL;
+	DWORD dwRead;
+	BOOL bSuccess = FALSE;
+	SECURITY_ATTRIBUTES saAttr;
+	
+	STARTUPINFO si = {0};
+	
+	PROCESS_INFORMATION pi = {0};
+	saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
+	saAttr.bInheritHandle = TRUE;
+	saAttr.lpSecurityDescriptor = NULL;
+	
+	CreatePipe( &g_IN_Rd, &g_IN_Wr, &saAttr, 0 );
+	CreatePipe( &g_OUT_Rd, &g_OUT_Wr, &saAttr, 0 );
+	SetHandleInformation( g_IN_Wr, HANDLE_FLAG_INHERIT, 0 );
+	
+	si.cb = sizeof(STARTUPINFO);
+	si.dwFlags = STARTF_USESTDHANDLES;
+	si.hStdInput = g_IN_Rd;
+	si.hStdOutput = g_OUT_Wr;
+	si.hStdError = g_OUT_Wr;
+	si.wShowWindow = SW_HIDE;
+	si.dwFlags |= STARTF_USESTDHANDLES;
+
+	CreateProcess( NULL, (char*)cmdline, NULL, NULL, true, CREATE_NO_WINDOW , NULL, NULL, &si, &pi );
+	
+	CloseHandle( g_OUT_Wr );
+	CloseHandle( g_IN_Wr );
+	
+	WaitForSingleObject( pi.hProcess, 500 );
+	
+	bSuccess = ReadFile( g_OUT_Rd, buffer, BUFSIZE, &dwRead, NULL );
+	buffer[BUFSIZE-1] = 0;
+	CloseHandle( g_IN_Rd );
+	CloseHandle( g_OUT_Rd );
+
+	return bSuccess;
+}
+
+int ID_ProcessWMIC( bloomfilter_t *value, const char *cmdline )
+{
+	char buffer[BUFSIZE], token[BUFSIZE], *pbuf;
+	int count = 0;
+
+	if( !ID_RunWMIC( buffer, cmdline ) )
+		return 0;
+	pbuf = COM_ParseFile( buffer, token ); // Header
+	while( pbuf = COM_ParseFile( pbuf, token ) )
+	{
+		if( !ID_VerifyHEX( token ) )
+			continue;
+
+		*value |= BloomFilter_ProcessStr( token );
+		count ++;
+	}
+
+	return count;
+}
+
+int ID_CheckWMIC( bloomfilter_t value, const char *cmdline )
+{
+	char buffer[BUFSIZE], token[BUFSIZE], *pbuf;
+	int count = 0;
+
+	if( !ID_RunWMIC( buffer, cmdline ) )
+		return 0;
+	pbuf = COM_ParseFile( buffer, token ); // Header
+	while( pbuf = COM_ParseFile( pbuf, token ) )
+	{
+		bloomfilter_t filter;
+
+		if( !ID_VerifyHEX( token ) )
+			continue;
+
+		filter = BloomFilter_ProcessStr( token );
+		count += ( filter & value ) == filter;
+	}
+
+	return count;
+}
+#endif
+
+
+#if TARGET_OS_IOS
+char *IOS_GetUDID( void );
+#endif
+
+bloomfilter_t ID_GenerateRawId( void )
+{
+	bloomfilter_t value = 0;
+	int count = 0;
+
+#ifdef __linux__
+#if defined(__ANDROID__) && !defined(XASH_DEDICATED)
+	{
+		const char *androidid = Android_GetAndroidID();
+		if( androidid && ID_VerifyHEX( androidid ) )
+		{
+			value |= BloomFilter_ProcessStr( androidid );
+			count ++;
+		}
+	}
+#endif
+	count += ID_ProcessCPUInfo( &value );
+	count += ID_ProcessFiles( &value, "/sys/block", "device/cid" );
+	count += ID_ProcessNetDevices( &value );
+#endif
+#ifdef _WIN32
+	count += ID_ProcessWMIC( &value, "wmic path win32_physicalmedia get SerialNumber " );
+	count += ID_ProcessWMIC( &value, "wmic bios get serialnumber " );
+#endif
+#if TARGET_OS_IOS
+	{
+		value |= BloomFilter_ProcessStr(IOS_GetUDID());
+		count ++;
+	}
+#endif
+	return value;
+}
+
+uint ID_CheckRawId( bloomfilter_t filter )
+{
+	bloomfilter_t value = 0;
+	int count = 0;
+
+#ifdef __linux__
+#if defined(__ANDROID__) && !defined(XASH_DEDICATED)
+	{
+		const char *androidid = Android_GetAndroidID();
+		if( androidid && ID_VerifyHEX( androidid ) )
+		{
+			value = BloomFilter_ProcessStr( androidid );
+			count += (filter & value) == value;
+			value = 0;
+		}
+	}
+#endif
+	count += ID_CheckNetDevices( filter );
+	count += ID_CheckFiles( filter, "/sys/block", "device/cid" );
+	if( ID_ProcessCPUInfo( &value ) )
+		count += (filter & value) == value;
+#endif
+	
+#ifdef _WIN32
+	count += ID_CheckWMIC( filter, "wmic path win32_physicalmedia get SerialNumber" );
+	count += ID_CheckWMIC( filter, "wmic bios get serialnumber" );
+#endif
+
+#if TARGET_OS_IOS
+	{
+		value = BloomFilter_ProcessStr(IOS_GetUDID());
+		count += (filter & value) == value;
+		value = 0;
+	}
+#endif
+#if 0
+	Msg( "ID_CheckRawId: %d\n", count );
+#endif
+	return count;
+}
+
+#define SYSTEM_XOR_MASK 0x10331c2dce4c91db
+#define GAME_XOR_MASK 0x7ffc48fbac1711f1
+
+void ID_Check()
+{
+	uint weight = BloomFilter_Weight( id );
+	uint mincount = weight >> 2;
+
+	if( mincount < 1 )
+		mincount = 1;
+
+	if( weight > MAXBITS_CHECK )
+	{
+		id = 0;
+#if 0
+		Msg( "ID_Check(): fail %d\n", weight );
+#endif
+		return;
+	}
+
+	if( ID_CheckRawId( id ) < mincount )
+		id = 0;
+#if 0
+	Msg( "ID_Check(): success %d\n", weight );
+#endif
+}
+
+const char *ID_GetMD5()
+{
+	if( id_customid[0] )
+		return id_customid;
+	return id_md5;
+}
+
+/*
+===============
+ID_SetCustomClientID
+
+===============
+*/
+void GAME_EXPORT ID_SetCustomClientID( const char *id )
+{
+	if( !id )
+		return;
+
+	Q_strncpy( id_customid, id, sizeof( id_customid  ) );
+}
+
+void ID_Init( void )
+{
+	MD5Context_t hash = {0};
+	byte md5[16];
+	int i;
+
+	Cmd_AddCommand( "bloomfilter", ID_BloomFilter_f, "print bloomfilter raw value of arguments set");
+	Cmd_AddCommand( "verifyhex", ID_VerifyHEX_f, "check if id source seems to be fake" );
+#ifdef __linux__
+	Cmd_AddCommand( "testcpuinfo", ID_TestCPUInfo_f, "try read cpu serial" );
+#endif
+
+#if defined(__ANDROID__) && !defined(XASH_DEDICATED)
+	sscanf( Android_LoadID(), "%016llX", &id );
+	if( id )
+	{
+		id ^= SYSTEM_XOR_MASK;
+		ID_Check();
+	}
+	
+#elif defined _WIN32
+	{
+		CHAR szBuf[MAX_PATH];
+		ID_GetKeyData( HKEY_CURRENT_USER, "Software\\Xash3D\\", "xash_id", szBuf, MAX_PATH );
+		
+		sscanf(szBuf, "%016llX", &id);
+		id ^= SYSTEM_XOR_MASK;
+		ID_Check();
+	}
+#else
+	{
+		const char *home = getenv( "HOME" );
+		if( home )
+		{
+			FILE *cfg = fopen( va( "%s/.config/.xash_id", home ), "r" );
+			if( !cfg )
+				cfg = fopen( va( "%s/.local/.xash_id", home ), "r" );
+			if( !cfg )
+				cfg = fopen( va( "%s/.xash_id", home ), "r" );
+			if( cfg )
+			{
+				if( fscanf( cfg, "%016llX", &id ) > 0 )
+				{
+					id ^= SYSTEM_XOR_MASK;
+					ID_Check();
+				}
+				fclose( cfg );
+			}
+		}
+	}
+#endif
+	if( !id )
+	{
+		const char *buf = (const char*) FS_LoadFile( ".xash_id", NULL, false );
+		if( buf )
+		{
+			sscanf( buf, "%016llX", &id );
+			id ^= GAME_XOR_MASK;
+			ID_Check();
+		}
+	}
+	if( !id )
+		id = ID_GenerateRawId();
+
+	MD5Init( &hash );
+	MD5Update( &hash, (byte *)&id, sizeof( id ) );
+	MD5Final( (byte*)md5, &hash );
+
+	for( i = 0; i < 16; i++ )
+		Q_sprintf( &id_md5[i*2], "%02hhx", md5[i] );
+
+#if defined(__ANDROID__) && !defined(XASH_DEDICATED)
+	Android_SaveID( va("%016llX", id^SYSTEM_XOR_MASK ) );
+#elif defined _WIN32
+	{
+		CHAR Buf[MAX_PATH];
+		sprintf( Buf, "%016llX", id^SYSTEM_XOR_MASK );
+		ID_SetKeyData( HKEY_CURRENT_USER, "Software\\Xash3D\\", REG_SZ, "xash_id", Buf, Q_strlen(Buf) );
+	}
+#else
+	{
+		const char *home = getenv( "HOME" );
+		if( home )
+		{
+			FILE *cfg = fopen( va( "%s/.config/.xash_id", home ), "w" );
+			if( !cfg )
+				cfg = fopen( va( "%s/.local/.xash_id", home ), "w" );
+			if( !cfg )
+				cfg = fopen( va( "%s/.xash_id", home ), "w" );
+			if( cfg )
+			{
+				fprintf( cfg, "%016llX", id^SYSTEM_XOR_MASK );
+				fclose( cfg );
+			}
+		}
+	}
+#endif
+	FS_WriteFile( ".xash_id", va("%016llX", id^GAME_XOR_MASK), 16 );
+#if 0
+	Msg("MD5 id: %s\nRAW id:%016llX\n", id_md5, id );
+#endif
+}