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:
Apr. 06, 2021
Filed:
Aug. 31, 2017
Applicant:
Visa International Service Association, San Francisco, CA (US);
Inventors:
Oleg Gryb, San Francisco, CA (US);
Sekhar Nagasundaram, San Ramon, CA (US);
Assignee:
Visa International Service Association, San Francisco, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/08 (2006.01); G06F 21/57 (2013.01); G06F 21/62 (2013.01); H04L 9/14 (2006.01);
U.S. Cl.
CPC ...
H04L 9/0869 (2013.01); G06F 21/575 (2013.01); G06F 21/6218 (2013.01); H04L 9/085 (2013.01); H04L 9/14 (2013.01); G06F 2221/2107 (2013.01); H04L 2209/46 (2013.01);
Abstract
A computer node comprising multiple software modules may receive a cryptographic key from a hardware security module. The computer node may use the cryptographic key to produce two key portions, which are distributed to two software modules. These software modules and an optional additional software module may use the key portions in order to encrypt an initial message. The key portions and their locations in memory are periodically updated in order to provide improved cryptographic security.