| 摘要 |
PROBLEM TO BE SOLVED: To provide an authentication method for solving a problem that information in a communication device cannot be protected when a forgotten password is restored.SOLUTION: A communication device 301 comprises: specific password registration means 71 for registering a specific password required for information management; and other device registration means 72 for registering a peculiar code and a peculiar password of at least one other communication device for every other communication device after registration of the specific password by the specific password registration means. |
