DOI码：10.13154/tosc.v2020.i1.425-457

发表刊物：IACR Transactions on Symmetric Cryptology

关键字：Block ciphers, Coupling, Tweakable block ciphers, Generalized Feistel networks, Provable security, Mode of operation

摘要：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 Feistelnetwork 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.

第一作者：沈耀斌

论文类型：Journal article (JA)

学科门类：工学

文献类型：J

卷号：2020

期号：1

页面范围：425–457

ISSN号：2519-173X

是否译文：否

发表时间：2020-05-07