Embedded System Based Improvement and Implementation of 802.16 AES-CCM Algorithm

WiMAX takes AES-CCM as its packet data encryption algorithm.Through thorough analysis of the AES-CCM algorithm,this paper optimizes the round transformation of AES algorithm by changing the four step of round transformation into inquiry of the lookup table and xor operation so as to predigest its operation process.Paper also brings forward improvement measures for CCM pattern applicable rules in 802.16 to strengthen the resistance to replay attacking.On the platform of ARM+VxWorks developed by FUJITSU 3400 WiMAX,the data encryption and transmission scheme is designed and realized by adopting the AES-CCM algorithm.The algorithm is put to test proving that the proposed approach can adequately enhance correctness and validity of the algorithm module.