Key Substitution Attacks on Multisignature Schemes
Bennian Dou, Hong Zhang, Chunhua Chen, Chungen Xu · IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences · 2012
In this letter, we point out that key substitution attacks should be taken into account for multisignature schemes, which implies that the existing security notions for multisignature schemes are not sufficient. As an example, we show that the multisignature scheme proposed by Boldyreva at PKC'03 is susceptible to key substitution attacks.