The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 2024
Filed:
Jan. 08, 2020
Bitkey Inc., Tokyo, JP;
Yuki Ejiri, Tokyo, JP;
Hiroshi Yamamoto, Tokyo, JP;
BITKEY INC., Tokyo, JP;
Abstract
The present invention reduces security risks while improving convenience in a utilization control technique of a usage target object. A utilization control device () can communicate only via Near Field Communication, and is separated from a network. And in the utilization control device (), a hole data including a public key is set. In a use permit notification device (), a use permit and signature are registered for each user ID. The signature is generated by using a private key paired with the public key included in the hole data. The use permit notification device () sends the use permit and signature in connection with the ID read from an ID card () to the utilization control device () via the Near Field Communication. The utilization control device () verifies the signature received together with the use permit by using the public key included in the hole data, obtains and refers to the transaction information included in the use permit when the verification is successful, and unlocks an entrance () of the house () if the conditions specified by the transaction information are satisfied.