Abstract：To solve IEEE 802.11i security threats of DoS attacks， no user identity protection and loss of MSK resulting in information leakage because of no provision of security protection for management frames and control frames, a physical layer security solution of iJam was introduced. The physical layer key of Ki between STA and AP before 802.11i authentication was generated to prevent management frames and control frames from DoS attack, and to protect user identity and enhance the PTK security. The scheme of WLAN security enhancement was proposed to analyze the 802.11i security, the increased delay and energy and the compatibility after iJam introduction. The results show that the security threats of 802.11i are overcome with enhanced security by the proposed scheme proposal， while the introduced delay and energy consumption is very limited. The introduction of iJam has little effect on the framework of 802.11i.
2013, Vol. 34 
