在修改标准数字签名算法DSA的基础上,设计了一个新的具有前向保密性的签密方案,与此前的方案相比,新方案具有较高的通信效率,在假设CDH问题是困难的情况下,给出了新方案在随机预言机模型下的安全性证明。
Based on the modification of the standard signature algorithm DSA,an efficient signcryption scheme with forward secrecy was designed. The new scheme has lower communication overhead than the others before. Presumed the difficulty of Computational Diffie-Hellman Problem,the security proofs for the new scheme is given in the random oracle model.