Cryptanalysis on a Proxy Multi-Signature Scheme
Feng Cao, Zhenfu Cao · 2006
In 2005, Hsu et al.'s proposed a new proxy multi-signature schemes which was more efficient in terms of the communication costs and the computational compared with Yi et al's scheme which was proposed in 2000. However, their schemes suffer from some drawbacks. In this paper we show that their schemes are insecure against the original signers' forgery