Cryptology ePrint Archive: Report 2010/308

Attacking M&M Collective Signature Scheme

Michal Rjaško and Martin Stanek

Abstract: A collective signature scheme aims to solve the problem of signing a message by multiple signers. Recently, Moldovyan and Moldovyan [1] proposed a scheme for collective signatures based on Schnorr signatures. We show some security weaknesses of the scheme.

Category / Keywords: public-key cryptography / Collective digital signatures

Date: received 24 May 2010, last revised 24 May 2010

Contact author: rjasko at dcs fmph uniba sk

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Version: 20100525:212450 (All versions of this report)

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