TY - JFULL AU - M. Junaid and Muid Mufti and M. Umar Ilyas PY - 2007/12/ TI - Vulnerabilities of IEEE 802.11i Wireless LAN CCMP Protocol T2 - International Journal of Electronics and Communication Engineering SP - 3775 EP - 3781 VL - 1 SN - 1307-6892 UR - https://publications.waset.org/pdf/7162 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 11, 2007 N2 - IEEE has recently incorporated CCMP protocol to provide robust security to IEEE 802.11 wireless LANs. It is found that CCMP has been designed with a weak nonce construction and transmission mechanism, which leads to the exposure of initial counter value. This weak construction of nonce renders the protocol vulnerable to attacks by intruders. This paper presents how the initial counter can be pre-computed by the intruder. This vulnerability of counter block value leads to pre-computation attack on the counter mode encryption of CCMP. The failure of the counter mode will result in the collapse of the whole security mechanism of 802.11 WLAN. ER -