DIGITAL ID STORAGE AND FEDERATION SERVICE MODEL

A digital ID storage and federation service model is disclosed. In the digital ID storage and federation service model according to the present invention, the custodian creates a federation ID (F-ID) mapped to a digital ID received from the issuer, delivers it to the holder, and stores it in a ledger for ID sharing. When the holder submits the F-ID to a service provider while requesting the service from the service provider, the service provider requests verification from the custodian, and when all ID transaction event history is recorded in a ledger for ID transaction, the custodian delivers that verification is normally completed to the service provider, and the service provider provides the requested service to the holder.