Method and system for smart card based three party key exchange, and smart card and microprocessor used thereto

摘要

The present invention is a three-way keys for performing secure key exchange without the intervention of a server using a smart card relates to a method and system for exchange and the smart card and the microprocessor used therein. Three-party key exchange method of a smart card-based according to the invention through the user's personal information and the server secret key, which contains personal information converted by the trapdoor hash function from the user terminal, the shoe for the user's personal information from a server Nord (schnorr) to generate a signature, registration information including a shoe Nord signature for the user personal information registration step of storing in the smart card; If the smart card and the interface (interfacing) to be that of user terminal through the personal information is entered, the user is a registered user by said user registration step using a shoe Nord signature for the user's personal information stored in the smart card user verification step of verifying whether a; When the verification by a registered user to generate a time stamp and signature shoe Nord credentials configuration step to configure the authentication information including the time stamp signature for the shoe Nord; Mutual authentication step exchange authentication information between the registered users through a network, and to exchange the authentication by using the authentication information; And the exchanged using a shoe Nord signature for the time stamp included in the authentication information comprises a step of generating a session key exchange key. ;