Operator confirmation server, operator confirmation system, operator confirmation method and operator confirmation program

摘要

[Problem] To provide an operator confirmation server, an operator confirmation system, an operator confirmation method, and an operator confirmation program which are capable of accurately ascertaining unauthorized use of a portable terminal device. [Solution] In a biological information storage unit 110, a terminal ID for identifying a portable terminal device 200, biological information, and date and time information are associated with each other, and stored. A transmission/reception unit 101 receives the terminal ID and biological information transmitted from the portable terminal device 200. A biological information verification unit 104 verifies the received biological information against the most recent biological information associated with the terminal ID and stored in the biological information storage unit 110. If it is determined that the biological information does not match, a user certificate, i.e. an electronic certificate corresponding to the user of the portable terminal device 200, is generated, and the transmission/reception unit 101 transmits the generated user certificate to the portable terminal device 200.