diff --git a/examples/06_bluedroid_demos/components/bluedroid_demos/app_core/bt_app_sec.c b/examples/06_bluedroid_demos/components/bluedroid_demos/app_core/bt_app_sec.c
new file mode 100644
index 000000000..7662e6e68
--- /dev/null
+++ b/examples/06_bluedroid_demos/components/bluedroid_demos/app_core/bt_app_sec.c
@@ -0,0 +1,108 @@
+/**
+ ****************************************************************************************
+ *
+ * @file bt_app_sec.c
+ *
+ * @brief Application entry point
+ *
+ * Copyright (C) Espressif 2016
+ * Created by Yulong at 2016/10/13
+ *
+ *
+ ****************************************************************************************
+ */
+
+#include "bt_app_sec.h"
+#include <stdlib.h>        // standard library
+#include <string.h>
+
+
+
+extern void srand (unsigned int seed);
+extern int random (void);
+
+/// Application Security Environment Structure
+tAPP_SEC_ENV app_sec_env;
+
+
+/*******************************************************************************
+**
+** Function         app_ble_sec_gen_tk
+**
+** Description      This function is called to generate the ble tk 
+**
+** Returns          the generate tk value
+**
+*******************************************************************************/
+UINT32 app_ble_sec_gen_tk(void)
+{
+    // Generate a PIN Code (Between 100000 and 999999)
+    return (100000 + (random()%900000));
+}
+
+/*******************************************************************************
+**
+** Function         app_ble_sec_gen_ltk
+**
+** Description      This function is called to generate the ble ltk 
+**
+** Returns          NULL
+**
+*******************************************************************************/
+void app_ble_sec_gen_ltk(UINT8 key_size)
+{
+    // Counter
+    UINT8 i;
+    app_sec_env.key_size = key_size;
+
+    // Randomly generate the LTK and the Random Number
+    for (i = 0; i < RAND_NB_LEN; i++)
+    {
+        app_sec_env.rand_nb.nb[i] = random()%256;
+    }
+
+    // Randomly generate the end of the LTK
+    for (i = 0; i < SEC_KEY_LEN; i++)
+    {
+        app_sec_env.ltk.key[i] = (((key_size) < (16 - i)) ? 0 : random()%256);
+    }
+
+    // Randomly generate the EDIV
+    app_sec_env.ediv = random()%65536;
+}
+
+
+/*******************************************************************************
+**
+** Function         app_ble_sec_init
+**
+** Description      This function is init the security env and function
+**
+** Returns          NULL
+**
+*******************************************************************************/
+void app_ble_sec_init()
+{
+    // Reset Security Environment
+    memset(&app_sec_env, 0, sizeof(app_sec_env));
+}
+
+
+/*******************************************************************************
+**
+** Function         app_ble_security_start
+**
+** Description      This function is called by the slave when the seurity start 
+**
+** Returns          NULL
+**
+*******************************************************************************/
+void app_ble_security_start(void)
+{
+    
+}
+
+
+
+
+
diff --git a/examples/06_bluedroid_demos/components/bluedroid_demos/include/bt_app_sec.h b/examples/06_bluedroid_demos/components/bluedroid_demos/include/bt_app_sec.h
new file mode 100644
index 000000000..6c003ae0c
--- /dev/null
+++ b/examples/06_bluedroid_demos/components/bluedroid_demos/include/bt_app_sec.h
@@ -0,0 +1,78 @@
+/**
+ ****************************************************************************************
+ *
+ * @file bt_app_sec.h
+ *
+ * @brief Application entry point
+ *
+ * Copyright (C) Espressif 2016
+ * Created by Yulong at 2016/10/13
+ *
+ *
+ ****************************************************************************************
+ */
+
+#include "bt_types.h"
+
+#define APP_SEC_IRK_FLAG        (0)
+#define RAND_NB_LEN         0x08
+#define SEC_KEY_LEN			0x10
+ 
+ /*
+  * STRUCTURES DEFINITIONS
+  ****************************************************************************************
+  */
+
+ 
+ /// Generic Security key structure
+typedef struct 
+ {
+	 /// Key value MSB -> LSB
+	 UINT8 key[SEC_KEY_LEN];
+ }smp_sec_key;
+
+ ///Random number structure
+typedef struct 
+{
+    ///8-byte array for random number
+    UINT8     nb[RAND_NB_LEN];
+}rand_nb;
+ 
+ typedef struct 
+ {
+	 // LTK
+	 smp_sec_key ltk;
+	 // Random Number
+	 rand_nb rand_nb;
+	 // EDIV
+	 UINT16 ediv;
+	 // LTK key size
+	 UINT8 key_size;
+	 
+	 // Last paired peer address type 
+	 UINT8 peer_addr_type;
+	 // Last paired peer address 
+	 BD_ADDR peer_addr;
+	 
+	 // authentication level
+	 UINT8 auth;
+ 
+ }tAPP_SEC_ENV;
+
+ extern tAPP_SEC_ENV app_sec_env;
+
+ /*
+ * GLOBAL FUNCTIONS DECLARATIONS
+ ****************************************************************************************
+ */
+
+void app_ble_sec_init(void);
+
+void app_ble_sec_pairing_cmp_evt_send(UINT8);
+
+UINT32 app_ble_sec_gen_tk(void);
+
+void app_ble_sec_gen_ltk(UINT8 key_size);
+
+void app_ble_security_start(void);
+