IDENTITY CONFIRMATION METHOD AND IDENTITY CONFIRMATION SYSTEM

An identity confirmation method and an identity confirmation system which do not require users to remember passwords, and which automatically update credentials for use in identity confirmation, without need for manipulation by users. This identity confirmation method and system receives current location information from a mobile communication device of a user in order to accumulate, as location information history, current location information of a user. As part of a process of confirming a user's identity, the identity confirmation system generates a question relating to this location information history. When the user returns an answer to the question, the identity confirmation system compares and matches the answer with the location information history and confirms the identity of the user if the answer coincides with the location information history.