diff --git a/CanUds.c b/CanUds.c
index f501787..7a9fd1f 100644
--- a/CanUds.c
+++ b/CanUds.c
@@ -66,6 +66,61 @@ static void PrintfDebug(uint8_t *data, uint8_t dlc) {
 
 }
 
+bool isSecurityAccessDenied(tCanUds *env, tPermissionSession isPermissionSession) {
+    bool result = false;
+
+    switch (isPermissionSession) {
+
+        case perm_session_defaultSession: {
+            if (env->currentSession == UDS_session_defaultSession)
+                result = true;
+            break;
+        }
+
+        case perm_session_programmingSession: {
+            if (env->currentSession == UDS_session_programmingSession)
+                result = true;
+            break;
+        }
+
+        case perm_session_extendedDiagnosticSession: {
+            if (env->currentSession == UDS_session_extendedDiagnosticSession)
+                result = true;
+            break;
+        }
+
+        case perm_session_defaultSession_programmingSession: {
+            if ((env->currentSession == UDS_session_defaultSession) ||
+                (env->currentSession == UDS_session_programmingSession))
+                result = true;
+            break;
+        }
+
+        case perm_session_defaultSession_extendedDiagnosticSession: {
+            if ((env->currentSession == UDS_session_defaultSession) ||
+                (env->currentSession == UDS_session_extendedDiagnosticSession))
+                result = true;
+            break;
+        }
+
+        case perm_session_extendedDiagnosticSession_programmingSession: {
+            if ((env->currentSession == UDS_session_extendedDiagnosticSession) ||
+                (env->currentSession == UDS_session_programmingSession))
+                result = true;
+            break;
+        }
+
+        case perm_session_all: {
+            result = true;
+            break;
+        }
+
+        default:
+            break;
+    }
+
+    return result;
+}
 
 char *sendLogCanUdsHex(tCanUds *env, uint8_t *data, size_t size) {
     memset(env->hexString, 0, sizeof(env->hexString));
@@ -222,6 +277,14 @@ static uint16_t ReadDataByIdentifier_22(tCanUds *env) {
     if (dataIdentifier_hi == 0xCF) {
 
         if (uds_ReadDataByIdentifier_22_com_CF[dataIdentifier_lo].data != NULL) {
+
+
+//            if (uds_ReadDataByIdentifier_22_com_CF[dataIdentifier_lo].isPermissionSession != NULL) {
+//
+//            }
+
+
+
             uint16_t response_size = uds_ReadDataByIdentifier_22_com_CF[dataIdentifier_lo].size;
 
             env->dataResponse[0] = UDS_ReadDataByIdentifier | 0b1000000;