Patent ID: 11956625
Assignee: BITKEY INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  E  G | IPC H

Claim 0:
1. A utilization control system that controls use of a usage target object, comprising:
a utilization control device that controls use of the usage target object by locking/unlocking, access control, or encrypting/decrypting, based on a use permit including transaction information specifying usage conditions for using the usage target object; and
a use permit notification device that notifies the use permit to the utilization control device, wherein,
the use permit notification device comprises:
a use permit storage means that stores the use permit together with a signature on the use permit generated by using a predetermined private key, for each user identification information;
an identification information obtaining means that obtains the user identification information; and
a use permit sending means that sends the use permit and the signature that are stored in the use permit storage means in association with the user identification information obtained by the identification information obtaining means, to the utilization control device via Near Field Communication,
the utilization control device can communicate only via the Near Field Communication, and comprises:
a hole data storage means that stores a hole data that includes a public key paired with the predetermined private key and is necessary for verification of the use permit;
a transaction information obtaining means that verifies the signature received together with the use permit from the use permit notification device by using the public key included in the hole data stored in the hole data storage means to obtain the transaction information included in the use permit when the verification being established; and
a lifting means that lifts restriction on use of the usage target object with referring to the transaction information obtained by the transaction information obtaining means when the usage conditions specified by the transaction information being satisfied.