Results 21 to 30 of about 13,379 (184)
Elastic Block Ciphers: The Feistel Cipher Case [PDF]
, 2004 We discuss the elastic versions of block ciphers whose round function processes subsets of bits from the data block differently, such as occurs in a Feistel network and in MISTY1.
Keromytis, Angelos D. +2 more
core +3 more sources
On Boomerang Attacks on Quadratic Feistel Ciphers
IACR Transactions on Symmetric Cryptology, 2023 The recent introduction of the Boomerang Connectivity Table (BCT) at Eurocrypt 2018 revived interest in boomerang cryptanalysis and in the need to correctly build boomerang distinguishers.
Xavier Bonnetain, Virginie Lallemand
doaj +2 more sources
Generalized Feistel Structures Based on Tweakable Block Ciphers
IACR Transactions on Symmetric Cryptology, 2022 A generalized Feistel structure (GFS) is a classical approach to construct a block cipher from pseudorandom functions (PRFs). Coron et al. at TCC 2010 instantiated a Feistel structure with a tweakable block cipher (TBC), and presented its provable ...
Kazuki Nakaya, Tetsu Iwata
doaj +3 more sources
Analysis of Diffusion Properties in Generalized Feistel Ciphers Under Multidimensional Linear Cryptanalysis [PDF]
IACR Transactions on Symmetric CryptologyThis paper presents a unified framework for generic attacks on Generalized Feistel Ciphers, with a primary focus on Type 1, Type 2, and unbalanced contracting (U-Type 1) Feistel constructions with non-invertible round functions.
Betül Aşkın Özdemir, Vincent Rijmen
doaj +3 more sources
Quantum Chosen-Ciphertext Attacks Against Feistel Ciphers [PDF]
, 2018 Seminal results by Luby and Rackoff show that the 3-round Feistel cipher is secure against chosen-plaintext attacks (CPAs), and the 4-round version is secure against chosen-ciphertext attacks (CCAs).
Ito, Gembu +9 more
core +6 more sources
Dynamic Rounds Chaotic Block Cipher Based on Keyword Abstract Extraction [PDF]
Entropy, 2018 According to the keyword abstract extraction function in the Natural Language Processing and Information Retrieval Sharing Platform (NLPIR), the design method of a dynamic rounds chaotic block cipher is presented in this paper, which takes into account ...
Juan Wang, Qun Ding
doaj +2 more sources
Generalized Feistel Ciphers for Efficient Prime Field Masking [PDF]
A recent work from Eurocrypt 2023 suggests that prime-field masking has excellent potential to improve the efficiency vs. security tradeoff of masked implementations against side-channel attacks, espe- cially in contexts where physical leakages show low ...
Standaert, François-Xavier +5 more
core +5 more sources
On the Indifferentiability of Key-Alternating Feistel Ciphers with No Key Derivation [PDF]
, 2015 Feistel constructions have been shown to be indifferentiable from random permutations at STOC 2011. Whereas how to properly mix the keys into an un-keyed Feistel construction without appealing to domain separation technique to obtain a block cipher which
Chun Guo, Dongdai Lin
core +4 more sources
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
doaj +1 more source
The Key-Dependent Message Security of Key-Alternating Feistel Ciphers [PDF]
, 2021 Key-Alternating Feistel (KAF) ciphers are a popular variant of Feistel ciphers whereby the round functions are defined as $x \mapsto F(k_i \oplus x)$, where k_i are the round keys and F is a public random function.
Yannick Seurin +3 more
core +2 more sources