Impossible Differential Distinguishers of Two Generalized Feistel Structures
نویسندگان
چکیده
منابع مشابه
Improved Differential Cryptanalysis on Generalized Feistel Schemes
Nachef et al [12] used differential cryptanalysis to study four types of Generalized Feistel Scheme (GFS). They gave the lower bound of maximum number of rounds that is indistinguishable from a random permutation. In this paper, we study the security of several types of GFS by exploiting the asymmetric property. We show that better lower bounds can be achieved for the Type-1 GFS, Type-3 GFS and...
متن کاملDifferential Attacks on Generalized Feistel Schemes
While generic attacks on classical Feistel schemes and unbalanced Feistel schemes have been studied a lot, generic attacks on several generalized Feistel schemes like type-1, type-2 and type-3 and Alternating Feistel schemes, as defined in [6], have not been systematically investigated. This is the aim of this paper. We give our best Known Plaintext Attacks and non-adaptive Chosen Plaintext Att...
متن کاملType 1.x Generalized Feistel Structures
We formalize the Type 1.x Generalized Feistel Structure (GFS) in order to fill the gap between Type 1 and Type 2 GFSs. This is a natural extension of Type 1 and Type 2 GFSs, and covers them as special cases. The diffusion property of GFS is known to vary depending on the permutation used in the round function. When we have two non-linear functions in one round, we propose a permutation that has...
متن کاملImpossible Boomerang Attack for Block Cipher Structures
Impossible boomerang attack [5] (IBA) is a new variant of differential cryptanalysis against block ciphers. Evident from its name, it combines the ideas of both impossible differential cryptanalysis and boomerang attack. Though such an attack might not be the best attack available, its complexity is still less than that of the exhaustive search. In impossible boomerang attack, impossible boomer...
متن کاملImpossible Differential Cryptanalysis for Block Cipher Structures
Impossible Differential Cryptanalysis(IDC) [4] uses impossible differential characteristics to retrieve a subkey material for the first or the last several rounds of block ciphers. Thus, the security of a block cipher against IDC can be evaluated by impossible differential characteristics. In this paper, we study impossible differential characteristics of block cipher structures whose round fun...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Security and Communication Networks
سال: 2020
ISSN: 1939-0114,1939-0122
DOI: 10.1155/2020/8828504