Research And Implementation Of Encrypted Digital Signature Algorithm In OA

Aiming at the e-mail security requirement in the OA system the article proposes the method of encryption and data signature.This method is based on the widely used e-mail encryption software PGP. The article analyzes the security weakness of the algorithms which consist of PGP,and presents corresponding improvement strategies to these problems. The article also constructs a new hash algorithm based on the new algorithm Rijndael and the probabilistic encryption based on RSA.It enhances the flexibility and improves the execution speed of the system. In the end, the article represents the realization scheme and analyzes its security.