Self-certified Universal Designated-Verifier Signcryption Scheme Based on Discrete Logarithm Problem

By integrating the thoughts of universal designated verifier signature and self-certified signcryption,a new selfcertified universal designated-verifier signcryption scheme based on discrete logarithm problem in finite field is proposed. The new scheme can protect the privacy of the signcryption holder,moreover it eliminates certificate existence problem and key escrow problem.The proposed has the merits of low communication overheads,little computation cost and good security,so it is propitious to applications in E-commerce and E-government.