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:
Jan. 20, 2026
Filed:
Apr. 25, 2022
Nchain Licensing Ag, Zug, CH;
Wei Zhang, London, GB;
Steven Patrick Coughlan, London, GB;
John Murphy, London, GB;
Arthur Gordan, London, GB;
nChain Licensing AG, Zug, CH;
Abstract
A computer-implemented method of verifying the integrity of part of a pre-image corresponding to a hash digest generated by hashing the preimage with a SHA-based hash function, wherein the pre-image comprises a first message and a second message, and wherein the method comprises: a) receiving an iteration input vector; b) obtaining a second sequence of blocks; c) generating a final iteration output vector by performing an iteration of the SHA-based hash computation for each of the second sequence of blocks in order of a respective position in the second sequence of blocks, wherein the iteration of the SHA-based hash computation performed on a first one of the second sequence of blocks is based on the obtained iteration input vector; and d) generating a candidate hash digest based on the final iteration output vector, the candidate hash digest being for comparison with the hash digest.