Results 11 to 20 of about 205 (141)
Throwing Boomerangs into Feistel Structures
IACR Transactions on Symmetric Cryptology, 2022 Automatic tools to search for boomerang distinguishers have seen significant advances over the past few years. However, most previous work has focused on ciphers based on a Substitution Permutation Network (SPN), while analyzing the Feistel structure is
Hosein Hadipour +2 more
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A Deep Learning Approach for Active S-Box Prediction of Lightweight Generalized Feistel Block Ciphers [PDF]
IEEE Access, 2021 One of the main security requirements for symmetric-key block ciphers is resistance against differential cryptanalysis. This is commonly assessed by counting the number of active substitution boxes (S-boxes) using search algorithms or mathematical ...
Mohamed Fadl Idris +3 more
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Improved Search of Boomerang Distinguishers for Generalized Feistel and Application to WARP
IACR Transactions on Symmetric CryptologyBoomerang and rectangle cryptanalysis are powerful cryptanalytic techniques for security evaluation of block ciphers. Automated search for boomerang distinguishers is an important area of research. In FSE 2023, Hadipour et al.
Xinhao Zeng, Lin Tan, Hong Xu
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Tweakable TWINE: Building a Tweakable Block Cipher on Generalized Feistel Structure
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2019 Tweakable block cipher (TBC) is an extension of conventional block cipher. We study how to build a TBC based on generalized Feistel structure (GFS), a classical block cipher construction. While known dedicated TBC proposals are based on substitution-permutation network (SPN), GFS has not been used for building TBC.
Kosei Sakamoto +8 more
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Tweakable Pseudorandom Permutation from Generalized Feistel Structure
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2008 Tweakable pseudorandom permutations have wide applications such as the disk sector encryption, and the underlying primitive for efficient MACs and authenticated encryption schemes. Goldenberg et al. showed constructions of a tweakable pseudorandom permutation based on the Feistel structure.
MITSUDA, Atsushi, IWATA, Tetsu
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Type-2 Generalized Feistel Structures Based on Tweakable Block Ciphers, Reconsidered [PDF]
IACR Communications in CryptologyGeneralized Feistel structures (GFSs) generalize a Feistel structure to have more flexible input length. Among them, Zheng et al. originally introduced type-2 GFS (CRYPTO '89) from pseudorandom functions (PRFs). This can be naturally instantiated with tweakable block ciphers (TBCs), which was analyzed by Nakaya and Iwata (ToSC 2022/FSE 2023). For a
Kento Tsuji, Tetsu Iwata
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New Wine Old Bottles : Feistel Structure Revised [PDF]
, 2022 This paper mainly investigates the iterative structures whose decryption is similar to the encryption. Firstly, we unify many well-known structures which share similar procedures between the decryption and the encryption, and give a sufficient and ...
Dong, Xinfeng +6 more
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Research and design of authenticated encryption algorithm based on AES round function
网络与信息安全学报, 2020 The authenticated encryption algorithm guarantees the confidentiality and integrity of the information at the same time, and has extensive research and application prospects in the field of information security. With the mixed integer linear programming
GAO Guoqiang, LI Zichen
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Impossible Differential Distinguishers of Two Generalized Feistel Structures [PDF]
Security and Communication Networks, 2020 Generalized Feistel structures are widely used in the design of block ciphers. In this paper, we focused on retrieving impossible differentials for two kinds of generalized Feistel structures: CAST256-like structure with Substitution-Permutation (SP) or Substitution-Permutation-Substitution (SPS) round functions (named CAST256SP and CAST256SPS ...
Huili Wang +4 more
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Dianzi Jishu Yingyong, 2021 NBC is a family of block ciphers using Generalized Feistel structure, designed by Xu Hong et al. There are three block and key sizes,i.e.,128/128, 128/256 and 256/256. A 16-bit Sbox is involved in the cipher as the non-linear component.
Yang Jiangshuai +3 more
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