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:
Aug. 03, 2023
Applicant:
Unisys Corporation, Blue Bell, PA (US);
Inventor:
Michael T Kain, Blue Bell, PA (US);
Assignee:
Unisys Corporation, Blue Bell, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 21/56 (2013.01); G06F 21/33 (2013.01); G06F 21/64 (2013.01);
U.S. Cl.
CPC ...
G06F 21/565 (2013.01); G06F 21/33 (2013.01); G06F 21/64 (2013.01);
Abstract
A processor-based method for securing files through a persistent signature includes selecting file contents; selecting a file header associated with the file contents; selecting a private key, a certificate identifier and a hash algorithm identifier; creating an encrypted hash of the file contents and file header using the hash algorithm and private key; and creating a persistent, independent signature for the file contents and file header that identifies the certificate identifier, hash algorithm identifier, and the encrypted hash value.