D PASSWORD AUTHENTICATION METHOD, PASSWORD MANAGEMENT SERVICE SYSTEM, INFORMATION TERMINAL, PASSWORD MANAGEMENT SERVICE DEVICE, USE TERMINAL AND PROGRAM THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide an ID password authentication method in which a plurality of use terminals can easily use an ID and a password without leaving to another person the management of the ID and the password against the risks of leakage and illegal use.;SOLUTION: The ID password authentication method at the use of a Web service, using a password management service system constituted by the use terminals, an information terminal and a password management service device, includes the steps of possession authentication, public key transmission, encryption key generation, encrypted information transmission, encryption key transmission and encryption key decryption.;SELECTED DRAWING: Figure 8;COPYRIGHT: (C)2017,JPO&INPIT