Identity-based improvement of wireless transport layer security handshake protocol
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The Wireless Transport Layer Security(WTLS) handshake protocol was built based on digital certificate mechanism.However,there exist several flaws in WTLS.For example,both the communication and computation overload are high.Moreover,it does not verify the server certificate on-line.In order to solve these issues,an improved WTLS handshake protocol based on Identity-based Cryptosystem(IBC) was proposed.It is constructed based on ID,and IDs are exchanged between server and client instead of certificates.Identity-based Encryption(IBE),Identity-based Signature(IBS) and Identity-based Authenticated Key Agreement(IBAKA) were adopted to implement security functions of encryption,signature and key agreement respectively.Sender's ID information was embedded into encryption key computation,which can be used to authenticate the source of message.The analysis on security and efficiency shows that the efficiency of wireless communication is improved without security loss.