Cryptology ePrint Archive: Report 2022/429
Resurrecting Xifrat - Compact Cryptosystems 2nd Attempt
Jianfang "Danny" Niu
Abstract: Xifrat was a group-theoretic public-key cryptosystem based on a quasigroup with the special property of "restricted-commutativity". It was broken within half a month of its publication, due to a mistake made in the "mixing" function. In this paper, we revisit the design decisions made, proposing new constructions, and attempt (again) to build secure digital signature schemes and key encapsulation mechanisms. If the schemes can be proven secure, then this will be the most compact and the most efficient post-quantum cryptosystem ever proposed to date.
Category / Keywords: public-key cryptography / public-key cryptography, post-quantum cryptography, digital signature, key exchange
Date: received 4 Apr 2022, last revised 7 Apr 2022
Contact author: dannyniu at hotmail com
Available format(s): PDF | BibTeX Citation
Version: 20220407:080521 (All versions of this report)
Short URL: ia.cr/2022/429
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