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Security of balanced and unbalanced Feistel Schemes with Linear Non Equalities
secret-key cryptography Luby-Rackoff constructions Balanced random Feistel schemes Unbalanced random Feistel schemes Security Proofs
2010/7/13
In this paper we will study 2 security results \above the birthday bound" related to secret key cryptographic problems.1. The classical problem of the security of 4, 5, 6 rounds balanced Ran-dom Feist...
Distinguishing Attacks on a Kind of Generalized Unbalanced Feistel Network
Generalized Unbalanced Feistel Network Integral Distinguisher Non-surjective Distinguisher
2009/7/22
Recently, a new kind of Generalized Unbalanced Feistel Net-
work, denoted as GUFN-n, is proposed by Choy et al. at ACISP 2009.
The advantages of this structure are that it allows parallel computatio...
Generic attacks on Alternating Unbalanced Feistel Schemes
Unbalanced Feistel permutations pseudo-random permutations generic attacks on encryption schemes
2009/6/23
Generic attacks against classical (balanced) Feistel schemes,
unbalanced Feistel schemes with contracting functions and unbalanced
Feistel schemes with expanding functions have been studied in [12],...
Cryptographic Properties and Application of a Generalized Unbalanced Feistel Network Structure
Block Ciphers Generalized Unbalanced Feistel Network Differential Probability
2009/6/12
In this paper, we study GF-NLFSR, a Generalized Unbalanced Feistel
Network (GUFN) which can be considered as an extension of the outer function
FO of the KASUMI block cipher.We prove upper bounds fo...
Generic Attacks on Unbalanced Feistel Schemes with Expanding Functions
Unbalanced Feistel permutations pseudo-random permutations Block ciphers
2008/8/14
Unbalanced Feistel schemes with expanding functions are used to construct pseudo-random permutations from kn bits to kn bits by using random functions from n bits to (k − 1)n bits. At each round...