INFORMATICA Informatica 0868-4952 0868-4952 VU info21108 10.15388/Informatica.2010.276 Research article Delegatability of an Identity Based Strong Designated Verifier Signature Scheme Sun Xun xun.sun.cn@gmail.com Li Jianhua Yin Hu Chen Gongliang Sybase China, Shanghai 201203, China Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China School of Information Security Engineering, Shanghai Jiao Tong University, Shanghai 200240, China 01 01 2010 21 1 117 122 01 06 2008 01 10 2008

In 2007, Kancharla et al. proposed an identity-based strong designated verifier signature (IBSDVS) scheme based on bilinear pairings, and claimed it unforgeable and non-delegatable. However, in this paper, we show that this scheme is actually delegatable.

 designated verifier signature scheme non-delegatability