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:
Mar. 29, 2022
Filed:
Oct. 19, 2018
Applicant:
Sophos Limited, Abingdon, GB;
Inventors:
Karl Ackerman, Topsfield, MA (US);
Russell Humphries, Surrey, GB;
Daniel Salvatore Schiappa, Bedford, NH (US);
Kenneth D. Ray, Seattle, WA (US);
Andrew J. Thomas, Oxfordshire, GB;
Assignee:
Sophos Limited, Abingdon, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 21/62 (2013.01); H04L 29/06 (2006.01); G06N 20/00 (2019.01); G06F 16/93 (2019.01); G06F 16/28 (2019.01); G06F 16/13 (2019.01); G06F 21/64 (2013.01); H04L 9/32 (2006.01); H04L 41/00 (2022.01); H04L 41/22 (2022.01);
U.S. Cl.
CPC ...
G06F 21/6218 (2013.01); G06F 16/137 (2019.01); G06F 16/285 (2019.01); G06F 16/93 (2019.01); G06F 21/64 (2013.01); G06N 20/00 (2019.01); H04L 9/3265 (2013.01); H04L 41/20 (2013.01); H04L 41/22 (2013.01); H04L 63/08 (2013.01); H04L 63/0838 (2013.01); H04L 63/101 (2013.01); H04L 63/102 (2013.01); H04L 63/1408 (2013.01); H04L 63/1416 (2013.01); H04L 63/1425 (2013.01); H04L 63/1433 (2013.01); H04L 63/1441 (2013.01); H04L 63/20 (2013.01); H04L 63/205 (2013.01);
Abstract
A ledger stores chain of custody information for files throughout an enterprise network. By identifying files with a homologous identifier such as a fuzzy hash that permits piecewise evaluation of similarity, the ledger can be used to track a chain of custody over a sequence of changes in content, ownership, and file properties. The ledger can be used, e.g., to evaluate trustworthiness of a file the first time it is encountered by an endpoint, or to apply enterprise policies based on trust.