摘要： 讨论了在企业内部网中电子邮件系统的安全问题。采用对称密码算法对传输的信件进行加密，而加密该信件的对称密钥是用RSA算法加密的。根据MIME协议在收发两端对本次通信的密钥、签名与密文分别进行打包、识别与处理。利用公钥服务器来对公钥进行管理与维护。以此构成了企业内部电子邮件系统的安全体系。

关键词: 多用途网际邮件扩充协议, RSA, 简单邮件传输协议

Abstract: This paper discusses the security problem of Email system for Intranet. It adopts the symmetry cryptography algorithm toencrypt the transmitted email, while the symmetry key used for encrypting the email is encrypted by RSA algorithm. According to MIMEprotocol, the key,digital signatUre and cipher text are packaged and processed at the both sides. The public keys are managed and maintainedby public key server. So a security email system for Intranet is constructed.

中图分类号: 

• TP393.098