US 12,219,059 B2
Utilization management system, management device, utilization control device, user terminal, utilization management method, and program
Yuki Ejiri, Tokyo (JP); and Hiroshi Yamamoto, Tokyo (JP)
Assigned to BITKEY INC., Tokyo (JP)
Appl. No. 17/637,560
Filed by BITKEY INC., Tokyo (JP)
PCT Filed Jan. 24, 2020, PCT No. PCT/JP2020/002638
§ 371(c)(1), (2) Date Feb. 23, 2022,
PCT Pub. No. WO2021/038903, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2019-155952 (JP), filed on Aug. 28, 2019.
Prior Publication US 2022/0278840 A1, Sep. 1, 2022
Int. Cl. H04L 9/14 (2006.01); H04L 9/08 (2006.01); H04W 4/80 (2018.01)
CPC H04L 9/14 (2013.01) [H04L 9/0825 (2013.01); H04W 4/80 (2018.02); H04L 2209/80 (2013.01)] 19 Claims
OG exemplary drawing
 
16. A user terminal configured to notify a utilization control device that is configured to control use of a usage target object by locking/unlocking, access control, or encrypting/decrypting based on a use permit obtained from a management device configured to manage the utilization control device, the user terminal comprising:
at least one processor configured to execute a computer readable instruction so as to:
store a third secret key that pairs with a third public key stored in the management device and associated with the user terminal,
send the use permit and a second signature received from the management device to the utilization control device via Near Field Communication, and
generate a third signature on a nonce received from the utilization control device by using the third secret key to send the third signature to the utilization control device via Near Field Communication.