研究了RSA签密技术.基于Coron的通用填充方法,提出了一种使用RSA的混合签密方案RSA-HS.基于RSA问题的困难性假设,可以证明该方案在随机预言(RO,Random Oracle)模型下是安全的.仿真结果表明:该方案能签密任意长度的消息,以一种简单的方式提供不可否认性,并且其通信开销仅为一个RSA模长.在消息恢复带宽方面。该方案明显优于传统的StE方案。
Technology of RSA (Ron Rivest, AdiShamir and Leonard Adleman) signcrypt was discussed. On the basis of universal padding from Coron's method, a new hybrid signcryption scheme using RSA was proposed. Assuming the intractability of RSA problem, the scheme was provably secure under the random oracle model. The simulation indicated that this scheme could signcrypt the message of any length and provide the non-repudiation in a simple manner, and its communication overload was only one RSA modular length. The scheme exceeds the traditional signature to encryption scheme in the bandwidth of message recovery.