Differential Cryptanalysis for a 3-round Spn
نویسندگان
چکیده
SPNs (Substitution Permutation Networks) are one of the important architectures used for designing block ciphers. In our study, we applied differential cryptanalysis method for a 3-round SPN. We have used a 16-bit input as plaintext and 16-bit output as ciphertext and chosen the first row of the third S-box of DES (Data Encryption Standard) for the necessary S-box and ShiftRows transformation which is used to permute bytes in AES (Advanced Encryption Standard) for permutation of bits for our SPN. As a result, we have obtained 12-bit key of 16-bit key from the last round of the cipher using differential cryptanalysis method.
منابع مشابه
Security evaluation of MISTY structure with SPN round function
This paper deals with the security of MISTY structure with SPN round function. We study the lower bound of the number of active s-boxes for differential and linear characteristics of such block cipher construction. Previous result shows that the differential bound is consistent with the case of Feistel structure with SPN round function, yet the situation changes when considering the linear boun...
متن کاملImpossible differential cryptanalysis of SPN ciphers
Impossible differential cryptanalysis is a very popular tool for analyzing the security of modern block ciphers and the core of such attack is based on the existence of impossible differentials. Currently, most methods for finding impossible differentials are based on the miss-in-the-middle technique and they are very ad-hoc. In this paper, we concentrate SPN ciphers whose diffusion layer is de...
متن کاملA new method for accelerating impossible differential cryptanalysis and its application on LBlock
Impossible differential cryptanalysis, the extension of differential cryptanalysis, is one of the most efficient attacks against block ciphers. This cryptanalysis method has been applied to most of the block ciphers and has shown significant results. Using structures, key schedule considerations, early abort, and pre-computation are some common methods to reduce complexities of this attack. In ...
متن کاملImpossible Differential Cryptanalysis of Reduced-Round Midori64 Block Cipher (Extended Version)
Impossible differential attack is a well-known mean to examine robustness of block ciphers. Using impossible differ- ential cryptanalysis, we analyze security of a family of lightweight block ciphers, named Midori, that are designed considering low energy consumption. Midori state size can be either 64 bits for Midori64 or 128 bits for Midori128; however, both vers...
متن کاملProvable Security Evaluation of Structures Against Impossible Differential and Zero Correlation Linear Cryptanalysis
Impossible differential and zero correlation linear cryptanalysis are two of the most important cryptanalytic vectors. To characterize the impossible differentials and zero correlation linear hulls which are independent of the choices of the non-linear components, Sun et al. proposed the structure deduced by a block cipher at CRYPTO 2015. Based on that, we concentrate in this paper on the secur...
متن کامل