Research Of WPKI Certificate Retraction Technologies In Mobile E-Commerce

As the mobile communication and internet become two pillar industries in this information society, the security of mobile e-commerce in wireless communication is more and more significant. WPKI, whose key component is the certificate retraction technology, plays an important role in the security of mobile e-commerce. In this dissertation, several solutions of the certificate retraction technology in WPKI have been analyzed and the key technologies of the OCSP technology have been studied deeply.At the beginning, the PKI technology, which is used to protect the security of computer network, is summarized, including basic theories protocols system structure and its application and development. Then, WPKI in wireless communication security is explained in detail. The following part is the main idea of this dissertation: several certificate retraction technologies in PKI have been analyzed and compared; with the main technologies in WPKI, OCSP is introduced, as well as the system design key technology and problems in its implement.Careful research and analyse have been done on several certificate retraction technologies in PKI and WPKI in this dissertation, it indicates that CRL in PKI does not fit for applying in wireless communication because the wireless terminals have small storage spaces and limited computing ability; compared with CRL and short-life certificate retraction, OCSP is more suitable for WPKI. Then the next conclusion is that by means of multithreading advance signing and hardware encrypting technology, OCSP will be more efficient. At last WPKI, with some problems itself, must be improved as the requirements of mobile e-commerce security increase in order to protect the computer network better.