Utilization management system, management device, utilization control device, user terminal, utilization management method, and program

Abstract

The present invention reduces security risks while improving the convenience of use management technology for a usage target object. A utilization control device (), upon receiving hole data with a first signature from a provider terminal (), verifies the first signature by using a first public key, to set the hole data to the device () itself when the signature verification is established. Furthermore, upon receiving a use permit with a second signature from a user terminal (), the utilization control device () verifies the second signature by using a second public key included in the hole data, transmits a nonce to the user terminal (), receives a third signature to the nonce from the user terminal (), and verifies the third signature by using a third public key included in the use permit. When the second and third signature verifications are both established, the utilization control device () refers to transaction information included in the use permit, and lifts restriction on use of the usage target object (house) when conditions identified by the transaction information are satisfied.