| 摘要 |
PROBLEM TO BE SOLVED: To ensure detection of an illegal login to a system and to prevent such an illegal login by specifying and registering next scheduled login time before logoff and rejecting login access which is illegally tried before the scheduled time. SOLUTION: A user of the system specifies and registers next scheduled login time or scheduled time up to next login in the system at some point of time from login to logoff. If a user other than the user having registered the time tries login after the logout and before the specified, registered time, the system judges this operation as illegal login and rejects it. Thus, the system automatically detects and rejects the illegal login by others, so the illegal action can be prevented more securely than the user does. Thus, the presence of this system restrains a person who tries illegal login to reduce illegal logins. |
