A New Template Attack Method of Advanced Encryption Standard

(Abstract ) ) ) )This paper proposes a new template attack method in order to improve the efficiency of Advanced Encryption Standard(AES) template attack. This method includes a new attack algorithm and an optimized schedule. This new attack algorithm can access to the whole 128 bit key of AES by establishing Hamming weight template on each nonlinear table and 128 times of template classifications and this optimized schedule includes the preprocessing and principal component analysis of the signal. Experimental results show that this method can improve the efficiency of template attack and also decrease the memory usage and computing. (Key words )Advanced Encryption Standard(AES); side channel signal attack; template attack; Principal Component Analysis(PCA);