Authenticating method

摘要

The present invention proposes a safe and quick individual certification method using a portable terminal. When a portable terminal 30 sends a request for certification to a certification server 10, the certification server 10 transmits query code for certification to the portable terminal 30. The portable terminal 30 transmits said query code to the certification server 10 via a reader 21 or the like and also via a sales management server 23 to be certified. The certification server 10 verifies the query code to that generated in the past, and returns a result of verification and personal data required by the sales management server 23 to the sales management server 23.