Welcome to the resource topic for 2022/291
Title:
Provable security of CFB mode of operation with external re-keying
Authors: Vadim Tsypyschev and Iliya Morgasov
Abstract:In this article the security of the cipher feedback mode of operation with regular external serial re-keying aiming to construct lightweight pseudo-random sequences generator is investigated. For this purpose the new mode of operation called Multi-key CFB, MCFB is introduced, and the estimations of provable security of this new mode in the LOR-CPA model are obtained. Besides that, the counterexample to well-known result of Abdalla-Bellare about security of encryption scheme with external re-keying is obtained.
ePrint: https://eprint.iacr.org/2022/291
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