The Design And Implement Of WPKI's Key Technology

Public Key Infrastructure(PKI) based on cryptology theory is a secure infrastrure that using public key technology and digital certificate to ensure the system security and validate the identity of the certificate's holder.Mainly through public key encryption, PKI implements the certificate's generation.management, archivement,enrollment and revocation, which provide authentication, privacy, integrity and non-reputation for entities in application system. However, traditional PKI is a platform under wire environment, which use cryptoghraphic algrithoms such an RSA and Diffie-Hellman. All of these algorithm's computing speed are slow and memory exhausting. Such drawbacks also exists in X.509 certificate. These characteristics limit the use of tradional PKI in wireless mobile terminal and it can't satisfied the secure problem under the wireless environment. In 2000, WAP(Wireless Application Protocol) forum issure the WPKI standards as an open specification to solve security issues in wireless environments.This paper analyses the PKI theory architecture detailedly, combining with researching the information security status quo and the wireless communication systems. On this condition, we put forward the feasible WPKI system, CA sub-system and RA sub-system logical frame diagram and network structure blue print. The technical criterions in the system and core content of WPKI, includes the certificate management(certificate requirement, certificate issue, certificate revocation, certificate query and so on), are discussed at length. In the end, the system's function and performance are tested. The design of our WPKI rigorously complies with standard specifications as PKI, WPKI and WAP, which ensures properties such as authority, justness and reliableness .