[Resource Topic] 2024/1188: Lightweight Dynamic Linear Components for Symmetric Cryptography

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Title:
Lightweight Dynamic Linear Components for Symmetric Cryptography

Authors: S. M. Dehnavi, M. R. Mirzaee Shamsabad

Abstract:

‎In this paper‎, ‎using the concept of equivalence of mappings we characterize all of the one-XOR matrices which are used in hardware applications and propose a family of lightweight linear mappings for software-oriented applications in symmetric cryptography‎. ‎Then‎, ‎we investigate interleaved linear mappings and based upon this study‎, ‎we present generalized dynamic primitive LFSRs along with dynamic linear components for construction of diffusion layers.
‎From the mathematical viewpoint‎, ‎this paper presents involutive sparse binary matrices as well as sparse binary matrices with sparse inverses‎. ‎Another interesting result of our investigation is that‎, ‎by our characterization of one-XOR matrices‎, ‎the search space for finding a k such that x^n+x^k+1 is a primitive trinomial could be reduced‎.

ePrint: https://eprint.iacr.org/2024/1188

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