The solution, which makes use of the method of combining PKI with S/MIME, establishes a system of secure E-mail transfer, according to the application principle of Public Key Infrastructure(PKI).

• 该方案依据PKI(公钥基础设施)的应用原理,采用PKI与S MIME相结合的方法,建立了基于PKI的安全邮件传输体系。