The present invention enables a user terminal to perform communication while maintaining anonymity of a user. An ID management device of the present invention includes a storage unit configured to store use status of identification information for communication of an application service provided within a predetermined area, an issuing unit configured to issue unused identification information to a user terminal provided with the application service, and an updating unit configured to, when unused identification information is issued, update the use status to indicate that the unused identification information is in use, and, when a use end condition for issued identification information is satisfied, update the use status to indicate that the issued identification information is unused.