Results 1 to 10 of about 108 (93)
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 +2 more sources
Cryptanalysis of a Generalized Unbalanced Feistel Network Structure [PDF]
Lecture Notes in Computer Science, 2010 This paper reevaluates the security of GF-NLFSR, a new kind of generalized unbalanced Feistel network structure that was proposed at ACISP 2009. We show that GF-NLFSR itself reveals a very slow diffusion rate, which could lead to several distinguishing attacks.
Ruilin Li, Bing Sun, Longjiang Qu
exaly +4 more sources
A Structural Attack on Type-I Generalized Feistel Networks [PDF]
IEEE Access, 2019 This paper presents generic structural cryptanalysis against type-I generalized Feistel networks (GFN), in which all the inner transformations are unknown. The target of our attack is to retrieve all the unknown round functions.
Ting Cui, Shiwei Chen, Haoran Zheng
doaj +2 more sources
Revisiting the shuffle of generalized Feistel structure
CybersecurityThe Generalized Feistel Structure ( $$\texttt{GFS}$$ GFS ) is one of the most widely used frameworks in symmetric cipher design. In FES 2010, Suzaki and Minematsu strengthened the cryptanalysis security of $$\texttt{GFS}$$ GFS by searching for shuffles ...
Yincen Chen +4 more
doaj +2 more sources
On Generalized Feistel Structures Using the Diffusion Switching Mechanism [PDF]
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2008 To design secure blockciphers, estimating immunity against differential attack and linear attack is essential. Recently, Diffusion Switching Mechanism (DSM) is proposed as a design framework to enhance the immunity of Feistel structure against differential attack and linear attack.
Kiyomichi Araki
exaly +2 more sources
IET Information Security, 2022 Generalized Feistel structures (called GFSs for short) are one of the most popular block cipher structures. They are mainly divided into type‐1, type‐2 and type‐3 GFS.
Xuan Shen +4 more
doaj +2 more sources
On the (im)possibility of improving the round diffusion of generalized Feistel structures
Information Processing Letters, 2022 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Tetsu Iwata
exaly +3 more sources
On the Diffusion of Generalized Feistel Structures Regarding Differential and Linear Cryptanalysis [PDF]
Lecture Notes in Computer Science, 2011 This paper studies the security of blockciphers with generalized Feistel structures (GFS) consisting of SP-type F-functions. While GFS leads to compact implementations, the security is not well understood, in particular for larger values of the partitioning number which indicates the number of subblocks.
Kyoji Shibutani, Shibutani Kyoji
exaly +2 more sources
Type 1.x Generalized Feistel Structures
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2014 Tetsu Iwata
exaly +2 more sources
Revisiting Impossible Differential Distinguishers of Two Generalized Feistel Structures [PDF]
Security and Communication Networks, 2021 Impossible differential attack is one of the most effective cryptanalytic methods for block ciphers. Its key step is to construct impossible differential distinguishers as long as possible. In this paper, we mainly focus on constructing longer impossible differential distinguishers for two kinds of generalized Feistel structures which are
Xuan Shen +3 more
openaire +1 more source