diff --git a/src/gap.h b/src/gap.h
index e8356ea77..1837b8b9c 100644
--- a/src/gap.h
+++ b/src/gap.h
@@ -68,6 +68,13 @@ typedef enum {
 	LEVEL_4,	
 } gap_security_level_t;
 
+typedef enum {
+	GAP_SECURITY_NONE,
+	GAP_SECUIRTY_ENCRYPTED,		// SSP: JUST WORKS
+	GAP_SECURITY_AUTHENTICATED, // SSP: numeric comparison, passkey, OOB 
+	// GAP_SECURITY_AUTHORIZED
+} gap_security_requirement_t;
+
 /**
  * @bbrief enable/disable bonding. default is enabled
  * @praram enabled