【摘 要】
：
Dear editor,rnIn recent years,we have witnessed a rapid development of the side-channel attacks,which deviate from the tradi-tional block-box model and exploit the leakages of crypto-graphic devices.Among those attacks,the so-called differen-tial power an
【机 构】
：
State Key Laboratory of Information Security,Institute of Information Engineering,Chinese Academy of
论文部分内容阅读
Dear editor,rnIn recent years,we have witnessed a rapid development of the side-channel attacks,which deviate from the tradi-tional block-box model and exploit the leakages of crypto-graphic devices.Among those attacks,the so-called differen-tial power analysis (DPA) exploiting the correlation between the instantaneous power consumption and the sensitive in-termediate values of a cryptographic algorithm is one of the most powerful techniques[1].Various countermeasures have been proposed in the literature to make the implementa-tion of cryptographic algorithms immune to DPA.In this study,we focus on the approach called threshold implemen-tation (TI) initially proposed by Nikova et al.[2]at ICICS 2006,which is provable secure against first-order DPA un-der certain leakage assumptions.The TI technique divides the input into several shares by Boolean masking,and the sharing scheme should satisfy three properties:correctness,non-completeness,and uniformity.Correctness states that the sum of output shares equals the correct output.Non-completeness requires each output share tobe computed in-dependent of at least one input share such that the unshared intermediate results are not revealed.Uniformity requires the input shares to be uniformly distributed.Moreover,for an iterative cryptographic algorithm,the output shares should also be uniform for subsequent computations.The TI technique has been widely applied to many symmetric-key cryptographic algorithms.After a series of work,the technique of TI has been largely extended and generalized.
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