An Improved AES Masking Method Smartcard Implementation for Resisting DPA Attacks
Xiaoan Zhou, Juan Peng, Liping Guo · 2013
To improve the DPA (Differential Power Analysis) resistance of a cryptographic device such as a smartcard and facilitate the implementation of hardware, the paper proposes an improved masking method on AES for resisting DPA. The paper uses a multiplicative inversion in finite field GF (2^4) instead of GF (2^8) to reduce the complexity of the operation. The key of the presented method is to make each intermediate result being masked by random numbers multiplexing and corresponding affine transformation to eliminate the vulnerabilities to power analysis attacks in the implementation of AES. The experimental results show that the scheme is efficient and security against the DPA attacks, and the masking algorithm have already been implemented on the smartcard.