Abstract
To study the vulnerability of Advanced Encryption Standard (AES) against electromagnetic side channel attacks,the article analyzed the electromagnetic information leakage model of microcomputer and the choice of D function. Then,concerning the AES-128 bits cryptographic system realized by the 89C51 microchip,Differential Electromagnetic Analysis (DEMA) algorithm,which was used into an attack experiment and succeeded in obtaining 128 bits secret key of AES-128,was described. After analyzing the experimental results,the leakage of secret information produced by ByteSub transformation was detected. This method can be regarded as a new protective measure in cryptographic systems.
Published Version
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