A Novel ID-Based Verifiably Encrypted Signature without Random Oracle
Xiao-Long Ma, Wei Cui, Lize Gu, Yixian Yang, Zhengming Hu · 2008
The verifiably encrypted signature schemes proposed by Asokan solved the fairness problem in the fair exchange process. In the work, we propose an ID-based strong unforgeability verifiably encrypted signature scheme without random oracles, and show that the security of the scheme is based on the difficulty of solving the computational Diffie-Hellman problem. Our scheme is obtained from a modification of Waters¿ recently proposed signature schemes. This is the first time that an ID-based verifyably encrypted signature schemes is proved in the standard model.