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. 25, 2025
Filed:
Apr. 12, 2022
Nchain Licensing Ag, Zug, CH;
Craig Steven Wright, London, GB;
Jack Owen Davies, London, GB;
nChain Licensing AG, Zug, CH;
Abstract
A challenge is input to a PUF device comprising a physically unclonable function, PUF. The device generates a corresponding response. A wallet application is instantiated to use a seed determined from the response, the instantiating comprising storing a transform of the seed or response in association with the wallet application. At a later time, a user supplies the wallet application with information demonstrating a right to use the seed, wherein the wallet application is configured so as in response to verify this information based on the transform as stored in association with the wallet application, and on condition that the information is thereby verified, to derive at least one child key from the seed. A blockchain transaction is then signed using the child key as derived by the wallet application in response to the verification.