Using MILP in Analysis of Feistel Structures and Improving Type II GFS by Switching Mechanism
| Autor: | Mahdi Sajadieh, Mohammad Vaziri |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Differential cryptanalysis
Computer science Linear cryptanalysis 0202 electrical engineering electronic engineering information engineering Structure (category theory) 020206 networking & telecommunications 020201 artificial intelligence & image processing 02 engineering and technology Differential (infinitesimal) Topology Block cipher |
| Zdroj: | Progress in Cryptology – INDOCRYPT 2018 ISBN: 9783030053772 INDOCRYPT |
| DOI: | 10.1007/978-3-030-05378-9_15 |
| Popis: | Some features of Feistel structures have caused them to be considered as an efficient structure for design of block ciphers. Although several structures are proposed relied on Feistel structure, the type-II generalized Feistel structures (GFS) based on SP-functions are more prominent. Because of difference cancellation, which occurs in Feistel structures, their resistance against differential and linear attack is not as expected. In order to improve the immunity of Feistel structures against differential and linear attack, two methods are proposed. One of them is using multiple MDS matrices, and the other is using changing permutations of sub-blocks. |
| Databáze: | OpenAIRE |
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