Design And Implementation Of OTA System Security

With the development of wireless network and value-added business, the application of the Over-the-air (OTA) technology has been applied in a lot of areas, the system security matter has abstracted tremandous interesting recently.The thesis studies the OTA services security mechanism, and proposes a new scheme of the implementation of the OTA system based on Wireless Pubilc Key Infrastructure (WPKI) by analyzing the properties of the existed OTA system. The improved OTA security system ensures transmission security, data integrity, management security effectively, and meets the need of the security properties of the authentication and anti-denial. With the description of the security system architecture, the security module and the implementation technology are emphasized in this thesis, and the system operation process is described as well.With a new certificate management function applied into the security management module of the OTA server port, a better service is realized on the client registration, information update, data checksum and download. At the same time, with the detailed description of the data synchronic realization method, problems including data-synchronic failure, package loss, and replay-attacks are discussed.The realization of sercurity function of OTA card has been discussed in detail in this thesis.Terminal system model, the flow of data and the negotiation of share keys are analyzed to realize the terminal's filesytem and security modules.Finally, the conclusion and future work are stated.