Paper Info
Title
Improved Security Bounds For Generalized Feistel Networks
Abstract
We revisit the security of various generalized Feistel networks. Concretely, for unbalanced, alternating, type-1, type-2, and type-3 Feistel networks built from random functions, we substantially improve the coupling analyzes of Hoang and Rogaway (CRYPTO 2010). For a tweakable blockcipher-based generalized Feistel network proposed by Coron et al. (TCC 2010), we present a coupling analysis and for the first time show that with enough rounds, it achieves 2n-bit security, and this provides highly secure, double-length tweakable blockciphers.
Year
DOI
Venue
2020
10.13154/tosc.v2020.i1.425-457
IACR TRANSACTIONS ON SYMMETRIC CRYPTOLOGY
Keywords
DocType
Volume
Block ciphers, Coupling, Tweakable block ciphers, Generalized Feistel networks, Provable security, Mode of operation
Journal
2020
Issue
Citations 
PageRank 
1
0
0.34
References 
Authors
0
3
Name
Order
Citations
PageRank
Yaobin Shen101.35
C. Guo2106.97
Lei Wang321.75