Secret communication method

Abstract

Abstract PROBLEM TO BE SOLVED: To eliminate an overhead for a verification procedure between terminal equipments and to prevent contradiction from being incurred between communication channels for ciphering/decoding communication data. SOLUTION: Terminal equipments 20, 30 hold a certificate signed digitally by a private key of a verification agency 40 with respect to an identification name of the terminal equipments and digital information of a public key as information to verify it that the terminal equipments are correct. In the case of security communication by the terminal equipments 20, 30, at first a channel to verify the terminal equipments with each other is open and each certificate is exchanged mutually to confirm the correctness of the opposite party. Then a communication channel for ciphering/decoding of the communication data is open for a higher layer of the communication channel opened for verification and a secret key of the correct key ciphering system is used in common by using the open public key ciphering system.

Inventors

• 👤 Kiyoto Tanaka
• 👤 清人 田中
• 👤 Katsuhiko Aoki
• 👤 克彦 青木

Bibliographic Details