Improving Clefia and six partitions Feistel structures by Multiple MDS Matrices | ||
| The Modares Journal of Electrical Engineering | ||
| Article 5, Volume 16, Issue 3, 2016, Pages 33-39 PDF (1.08 M) | ||
| Authors | ||
| Mahdi Sajadieh1; mohammad vaziri2; Ali Zaghian3 | ||
| 1Department of Electrical Engineering, Islamic Azad University, Isfahan (Khorasgan) Branch, Isfahan, Iran. | ||
| 2don't have | ||
| 3Malek Ashtar University of Technology, Isfahan | ||
| Abstract | ||
| Counting the minimum number of differential active S-boxes is a common way to evaluate the security of block ciphers against differential and linear cryptanalysis. In this paper, we use mixed-integer linear programming (MILP) to calculate minimum number of active S-boxes of the some Feistel structures. We focus on Type-II of Feistel structures with four and six partitions and explain how to analyze them by MILP when they have more than one MDS2 matrices (like Clefia) in their structure. Moreover, we propose a new four partitions Feistel structure with three multiple MDS matrices which have more active S-boxes rather than Clefia structure. We also generalize Clefia structure in to six partitions Feistel structure by three multiple MDS matrices for 192 bits block size. | ||
| Keywords | ||
| Keywords— Clefia Structure; Linear Programming; Switching Method; Generalized Feistel Structure; Active S-boxes | ||
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