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:
Oct. 24, 2023
Filed:
Jul. 21, 2021
Cryptography Research, Inc., San Jose, CA (US);
Paul C. Kocher, San Francisco, CA (US);
Pankaj Rohatgi, Los Altos, CA (US);
Joshua M. Jaffe, San Francisco, CA (US);
Cryptography Research, Inc., San Jose, CA (US);
Abstract
A method for performing a security chip protocol comprises receiving, by processing hardware of a security chip, a message from a first device as part of performing the security chip protocol. The processing hardware retrieves a secret value from secure storage hardware operatively coupled to the processing hardware. The processing hardware determines a path through a key tree based at least in part on the message. The processing hardware derives a validator at least in part from the secret value using a sequence of entropy redistribution operations associated with the path through the key tree. The processing hardware exchanges the validator between the security chip and the first device as part of the security chip protocol in order to authenticate at least one of the security chip or the first device.