Impossible Differential Distinguishers of Two Generalized Feistel Structures
Joint Authors
Ma, Wenping
Zheng, Linfeng
Li, Yushan
Wang, Huili
Liao, Lang
Source
Security and Communication Networks
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-09-22
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Information Technology and Computer Science
Abstract EN
Generalized Feistel structures are widely used in the design of block ciphers.
In this paper, we focused on retrieving impossible differentials for two kinds of generalized Feistel structures: CAST256-like structure with Substitution-Permutation (SP) or Substitution-Permutation-Substitution (SPS) round functions (named CAST256SP and CAST256SPS, respectively) and MARS-like structure with SP/SPS round function (named MARSSP and MARSSPS, respectively).
Known results show that for bijective round function, CAST256-like structures and MARS-like structures have (m2−1) and (2m−1) rounds impossible differentials, respectively.
By our observation, there existed (m2+m) rounds impossible differentials in CAST256SP and (3m−3) rounds impossible differentials in MARSSPS (this result does not require the P layer to be invertible).
When the diffusion layer satisfied some special conditions, CAST256SPS had (m2+m−1) rounds impossible differentials and MARSSPS had (3m−3) rounds impossible differentials.
American Psychological Association (APA)
Wang, Huili& Ma, Wenping& Liao, Lang& Li, Yushan& Zheng, Linfeng. 2020. Impossible Differential Distinguishers of Two Generalized Feistel Structures. Security and Communication Networks،Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1208612
Modern Language Association (MLA)
Wang, Huili…[et al.]. Impossible Differential Distinguishers of Two Generalized Feistel Structures. Security and Communication Networks No. 2020 (2020), pp.1-9.
https://search.emarefa.net/detail/BIM-1208612
American Medical Association (AMA)
Wang, Huili& Ma, Wenping& Liao, Lang& Li, Yushan& Zheng, Linfeng. Impossible Differential Distinguishers of Two Generalized Feistel Structures. Security and Communication Networks. 2020. Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1208612
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1208612