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:
Nov. 23, 2021
Filed:
Jul. 17, 2018
Legic Identsystems Ag, Wetzikon, CH;
Martin Buck, Zug, CH;
LEGIC Identsystems AG, Wetzikon, CH;
Abstract
For verifying authorization associated with a first electronic device by a second electronic device, using symmetric key encryption, the second electronic device receives from the first electronic device encrypted data and metadata with a key space identifier and positional information. The key space identifier defines a cryptographic key hierarchy and the positional information defines in the cryptographic key hierarchy the cryptographic key used to generate the encrypted data. The second electronic device derives the cryptographic key by way of a one-way function from cryptographic keys stored in the second electronic device, using the key space identifier and the positional information received from the first electronic device. The second electronic device decrypts the encrypted data, using the derived cryptographic key, for verifying the authorization associated with the first electronic device.