diff --git a/Src/CanSerialPortFrameXCP.c b/Src/CanSerialPortFrameXCP.c
index 630b521..8360bbd 100644
--- a/Src/CanSerialPortFrameXCP.c
+++ b/Src/CanSerialPortFrameXCP.c
@@ -14,46 +14,46 @@
 
 SECT_SRAM_XCP tXCP_DAQ DAQ[MAX_DAO];
 
-char strPrintfDebug[80];
+static char strPrintfDebug_XCP[80];
 
-void PrintfDebug(uint8_t *data, uint8_t dlc) {
+static void PrintfDebug(uint8_t *data, uint8_t dlc) {
 
     switch (dlc) {
 
         case 0:
-            sprintf(strPrintfDebug, " ");
+            sprintf(strPrintfDebug_XCP, " ");
             break;
         case 1:
-            sprintf(strPrintfDebug, "0x%02X", data[0]);
+            sprintf(strPrintfDebug_XCP, "0x%02X", data[0]);
             break;
         case 2:
-            sprintf(strPrintfDebug, "0x%02X:0x%02X", data[0], data[1]);
+            sprintf(strPrintfDebug_XCP, "0x%02X:0x%02X", data[0], data[1]);
             break;
         case 3:
-            sprintf(strPrintfDebug, "0x%02X:0x%02X:0x%02X", data[0], data[1], data[2]);
+            sprintf(strPrintfDebug_XCP, "0x%02X:0x%02X:0x%02X", data[0], data[1], data[2]);
             break;
         case 4:
-            sprintf(strPrintfDebug, "0x%02X:0x%02X:0x%02X:0x%02X", data[0], data[1], data[2], data[3]);
+            sprintf(strPrintfDebug_XCP, "0x%02X:0x%02X:0x%02X:0x%02X", data[0], data[1], data[2], data[3]);
             break;
         case 5:
-            sprintf(strPrintfDebug, "0x%02X:0x%02X:0x%02X:0x%02X:0x%02X", data[0], data[1], data[2], data[3], data[4]);
+            sprintf(strPrintfDebug_XCP, "0x%02X:0x%02X:0x%02X:0x%02X:0x%02X", data[0], data[1], data[2], data[3], data[4]);
             break;
         case 6:
-            sprintf(strPrintfDebug, "0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X", data[0], data[1], data[2], data[3],
+            sprintf(strPrintfDebug_XCP, "0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X", data[0], data[1], data[2], data[3],
                     data[4], data[5]);
             break;
         case 7:
-            sprintf(strPrintfDebug, "0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X", data[0], data[1], data[2],
+            sprintf(strPrintfDebug_XCP, "0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X", data[0], data[1], data[2],
                     data[3], data[4],
                     data[5], data[6]);
             break;
         case 8:
-            sprintf(strPrintfDebug, "0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X", data[0], data[1],
+            sprintf(strPrintfDebug_XCP, "0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X:0x%02X", data[0], data[1],
                     data[2], data[3], data[4],
                     data[5], data[6], data[7]);
             break;
         default:
-            sprintf(strPrintfDebug, " ");
+            sprintf(strPrintfDebug_XCP, " ");
     }
 
 }
@@ -78,7 +78,7 @@ static bool isUNLOCK(tCanSerialPortFrameXCP *env, eTypeProtect RESOURCE) {
 
     return false;
 }
-
+/*
 static unsigned long SeedToKeyHVAC_NAMI(unsigned char rnd, unsigned long dwSeedInfo) {
 #define Mask 0x55F388A6UL
 
@@ -97,6 +97,8 @@ static unsigned long SeedToKeyHVAC_NAMI(unsigned char rnd, unsigned long dwSeedI
 
     return key;
 }
+*/
+extern uint32_t generate_key(uint32_t seed);
 
 void CanSerialPortFrameXcpInit(
         tCanSerialPortFrameXCP *env,
@@ -268,7 +270,7 @@ static uint8_t XCP_GET_SEED_F8(tCanSerialPortFrameXCP *env) {
     eXcpCommand_GET_SEED *xcpCommand_GET_SEED = (eXcpCommand_GET_SEED *) env->response;
     xcpCommand_GET_SEED->COM = XCP_COMMAND_CONNECT;
     xcpCommand_GET_SEED->LEN = 4;
-    xcpCommand_GET_SEED->KEY = 0x11223344;
+    xcpCommand_GET_SEED->KEY = 0x853A08FB;
     env->RESOURCE = request->RESOURCE;
 
     return 6;
@@ -277,7 +279,7 @@ static uint8_t XCP_GET_SEED_F8(tCanSerialPortFrameXCP *env) {
 static uint8_t XCP_UNLOCK_F7(tCanSerialPortFrameXCP *env) {
     eXcpCommand_REQ_UNLOCK *request = (eXcpCommand_REQ_UNLOCK *) env->canFrame.data;
 
-    uint32_t securitySeedMy = SeedToKeyHVAC_NAMI(0, 0x11223344);
+    uint32_t securitySeedMy = generate_key(0x853A08FB);//SeedToKeyHVAC_NAMI(0, 0x11223344);
 
     if (securitySeedMy != request->KEY) {
         env->response[0] = XCP_COMMAND_DISCONNECT;
@@ -362,7 +364,7 @@ static uint8_t XCP_COMMAND_UPLOAD_F5(tCanSerialPortFrameXCP *env) {
 
 #if (LOG_XCP == 1)
             PrintfDebug(env->response, 1);
-            LoggerFormatInfo(LOGGER, LOG_SIGN, "< [%d] %s", 1, strPrintfDebug)
+            LoggerFormatInfo(LOGGER, LOG_SIGN, "< [%d] %s", 1, strPrintfDebug_XCP)
 #endif
             env->ioCanFrame->transmit(env->ioCanFrame->env, env->response, 1, PROTOCOL_CAN_ADR_XCP,
                                       PROTOCOL_CAN_TYPE_XCP,
@@ -380,7 +382,7 @@ static uint8_t XCP_COMMAND_UPLOAD_F5(tCanSerialPortFrameXCP *env) {
             env->ADR_MTA += 7;
 #if (LOG_XCP == 1)
             PrintfDebug(env->response, 7 + 1);
-            LoggerFormatInfo(LOGGER, LOG_SIGN, "< [%d] %s", 7 + 1, strPrintfDebug)
+            LoggerFormatInfo(LOGGER, LOG_SIGN, "< [%d] %s", 7 + 1, strPrintfDebug_XCP)
 #endif
             env->ioCanFrame->transmit(env->ioCanFrame->env, env->response, 7 + 1, PROTOCOL_CAN_ADR_XCP,
                                       PROTOCOL_CAN_TYPE_XCP,
@@ -393,7 +395,7 @@ static uint8_t XCP_COMMAND_UPLOAD_F5(tCanSerialPortFrameXCP *env) {
 
 #if (LOG_XCP == 1)
             PrintfDebug(env->response, tailBlock + 1);
-            LoggerFormatInfo(LOGGER, LOG_SIGN, "< [%d] %s", tailBlock + 1, strPrintfDebug)
+            LoggerFormatInfo(LOGGER, LOG_SIGN, "< [%d] %s", tailBlock + 1, strPrintfDebug_XCP)
 #endif
             env->ioCanFrame->transmit(env->ioCanFrame->env, env->response, tailBlock + 1, PROTOCOL_CAN_ADR_XCP,
                                       PROTOCOL_CAN_TYPE_XCP, 1000);
@@ -1621,7 +1623,7 @@ uint8_t vCanSerialPortFrameXcpReceive(tCanSerialPortFrameXCP *env, uint32 timeou
 #if (LOG_XCP == 1)
             if ((com != 0xD0) && (com != 0xF5)) {
                 PrintfDebug(env->canFrame.data, env->canFrame.dlc);
-                LoggerFormatInfo(LOGGER, LOG_SIGN, "> %s [%d] %s", xcp_com[com].desc, env->canFrame.dlc, strPrintfDebug)
+                LoggerFormatInfo(LOGGER, LOG_SIGN, "> %s [%d] %s", xcp_com[com].desc, env->canFrame.dlc, strPrintfDebug_XCP)
             }
 #endif
             if (xcp_com[com].func != NULL) {
@@ -1633,7 +1635,7 @@ uint8_t vCanSerialPortFrameXcpReceive(tCanSerialPortFrameXCP *env, uint32 timeou
 #if (LOG_XCP == 1)
                     if ((com != 0xD0) && (com != 0xF5)) {
                         PrintfDebug(env->response, response_size);
-                        LoggerFormatInfo(LOGGER, LOG_SIGN, "< [%d] %s", response_size, strPrintfDebug)
+                        LoggerFormatInfo(LOGGER, LOG_SIGN, "< [%d] %s", response_size, strPrintfDebug_XCP)
                     }
 #endif