Evaluation of security level of CLEFIA
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Power and Electromagnetic Analysis Attack on a Smart Card Implementation of CLEFIA
CLEFIA is a 128-bit block cipher developed by Sony Corporation in 2007. Since then, many papers related to security evaluations of CLEFIA have been published. However, these have mainly analyzed its mathematical weaknesses. In this study, we perform power and electromagnetic analysis attacks on a software implementation of CLEFIA. We implemented the CLEFIA algorithm with a 128-bit key length on...
متن کاملCompact and High Speed Hardware Implementation of the Block- Cipher Clefia
Main fundamental directions which are considered as important for practical ciphers are (1) security, (2) speed, and (3) cost for implementations. To realize these fundamental directions CLEFIA is designed. Clefia is a first block cipher employing the Diffusion Switching Mechanism (DSM) to enhance the immunity against the differential attack and the linear attack. Clefia uses lightweight compon...
متن کاملCompact and High Speed Hardware Implementation of the Block- Cipher Clefia
Main fundamental directions which are considered as important for practical ciphers are (1) security, (2) speed, and (3) cost for implementations. To realize these fundamental directions CLEFIA is designed. Clefia is a first block cipher employing the Diffusion Switching Mechanism (DSM) to enhance the immunity against the differential attack and the linear attack. Clefia uses lightweight compon...
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Linear cryptanalysis, along with differential cryptanalysis, is an important tool to evaluate the security of block ciphers. This work introduces a novel extension of linear cryptanalysis: zero-correlation linear cryptanalysis, a technique applicable to many block cipher constructions. It is based on linear approximations with a correlation value of exactly zero. For a permutation on n bits, an...
متن کاملSecurity Evaluation against Differential Cryptanalysis for Block Cipher Structures
Estimating immunity against differential and linear cryptanalysis is essential in designing secure block ciphers. A practical measure to achieve it is to find the minimal number of active S-boxes, or a lower bound for this minimal number. In this paper, we provide a general algorithm using integer programming, which not only can estimate a good lower bound of the minimal differential active S-b...
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تاریخ انتشار 2011