Abstract
To improve the efficiency of Advanced Encryption Standard(AES) algorithm on ARM processor,an optimization of AES was introduced and realized on ARM920T processor.One-time key expansion was adopted.In the algorithm,SubBytes() and MixColumns() were defined as T-table to store,which could increase the speed.The proposed algorithm programmed by C language was simulated and debugged on the ARM Develop v1.2 platform.Different implementations were compared in storage space and processing speed and a variety of different key length algorithm performances were given.The experimental results show that the execution speed of the presented algorithm improves significantly.
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