METHOD FOR MATERIALIZING KEY AGREEMENT PROTOCOL WITH KEY CONFIRMATION POSSIBLE TO CONFIRM COMMUNIZING OF DIFFIE-HELMAN TYPE KEY

摘要

PURPOSE: A method for materializing a key agreement protocol with key confirmation possible to confirm communizing of a Diffie-Helman type key is provided to supply the security by uniting a temporary personal key and a long-term personal key or by uniting only the temporary personal keys. CONSTITUTION: A method for materializing a key agreement protocol with key confirmation possible to confirm communizing of a Diffie-Helman type key includes a few steps. In the first step(210) substance A generates a pair of temporary keys. In the second step(212) substance A sends the temporary public key and a certificate of the public key to the substance B. In the third step(214) substance B certifies the temporary public key of substance A. In the fourth step(216) substance B generates a pair of temporary keys. In the fifth step(218) substance B generates k', a common key and k, a session key. In the sixth step(220) substance B calculates the message certifying code. In the seventh step(222) substance B sends the temporary public key, the certificate of the public key and the message certifying code to substance A. In the eighth step(224) substance A certifies the temporary public key of substance B. In the ninth step(226) substance A generates k', a common key In the tenth step(228) substance A calculates the message certifying code. In the eleventh step(230) substance A certifies the temporary public key of substance B. In the twelfth step(232) substance A calculates the temporary public key of substance B. In the thirteenth step(234) substance A calculates k, a session key. In the fourteenth step(236) substance A sends the message certifying code to substance B. In the fifteenth step(238) substance B calculates mA', a message certifying code. In the sixteenth step(240) substance B certifies the message certifying code of substance A.