Thomas Baigneres, Jacques Stern, and Serge Vaudenay, Linear cryptanalysis of non binary ciphers, Se- lected Areas in Cryptography (Carlisle M. Adams, Ali Miri, and Michael J. Wiener, eds.), Lecture Notes in Computer Science, vol. 4876, Springer, 2007, pp. 184-211....
However, complex chaotic systems are required to make ciphers more secure. Broadly, there are two types of dynamical chaotic systems: continuous-time and discrete-time. The latter is suitable for data encryption as it is feasible to implement on digital hardware. Among the basic discrete-time ...
2.1 Linear Cryptanalysis Linear cryptanalysis investigates linear relations among the parities of plaintext, ciphertext and the secret key. Let f : F2n → F2m be a vectorial boolean function. Assume that masks for input x and output f (x) are Γin and Γout. The correlation of the linear...
deriveaformulaforthestrengthofAlgorithm2forDES-fikeciphersand seewhatisitsdependenceontheplaintextdistribution. Finally,itis shownhowtoachieveprovenresistanceagainstlinearcryptanalysis. 1 LinearCryptanalysisofaDES-likeCipher WeconsideraDES-likeiteratedcipherconsistingofrroundsofiteration ...
The most important cryptographic property of a diffusion layer is the branch number of that diffusion layer, which represents the diffusion rate and measures security against linear and differential cryptanalysis. Therefore, MDS and Maximum Distance Binary Linear codes, which provide maximum branch number...
We first recall the basic variant of differential-linear cryptanalysis as introduced by Langford and Hellman [19]. Figure1shows the overview of the distinguisher. An entire cipherEis divided into two sub ciphers\(E_1\)and\(E_2\), such that\(E = E_2 \circ E_1\), and a differential ...
2.1Linear Cryptanalysis Linear cryptanalysis investigates linear relations among the parities of plaintext, ciphertext and the secret key. Let\(f:\mathbb {F}_{2^n}\rightarrow \mathbb {F}_{2^m}\)be a vectorial boolean function. Assume that masks for inputxand outputf(x) are\(\varGamma...
They have been used in the cryptanalysis of numerous sym- metric ciphers. Since the first and most important thing for the two methods is c International Association for Cryptologic Research 2016 T. Peyrin (Ed.): FSE 2016, LNCS 9783, pp. 268–288, 2016. DOI: 10.1007/978-3-662-52993-5...
linear cryptanalysissymmetric-key cipherSPN networkcipher on general groupIn this paper, we investigate an algorithm which can be used to compute improved estimates of squared correlations of linear approximations over key-alternating block ciphers. The algorithm was previously used by Cho [5] to ...
Fast correlation attacks, introduced by Meier and Staffelbach in 1989 [19], are commonly regarded as classical methods in the cryptanalysis of LFSR-based stream ciphers, which were usually implemented in hardware at that time. In general, fast correlation attacks have been constantly and steadily ...