| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the confirmation of safety of a user without a positive operation such as a reply by mail by a user being a safety confirmation object.SOLUTION: The registration of an information service (SNS, etc.) accompanied by log-in authentication, that is used by a user being a safety confirmation object, is previously received. When a disaster, etc. occurs, safety is determined based on whether the log-in authentication to the information service has been performed or not, and output. Thus, the safety of a user is easily confirmed without a positive operation such as a reply by mail by a user being a safety confirmation object. |
