Application of information security by PKI technology

The essential conception and constitution of PKI (Public Key Infrastructure)was discussed. Additional details focus on PKI technologic character. PKI adopts the RSA algorithm to encrypt the transmitted information and utilizes public key server to manage and maintain the public keys. So a security information system that sufficiently ensure shared resource and transited information security can be constructed. In the end,the Architecture Flow and program of Microsoft PKI system, also its application in information security were discussed.