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:
May. 28, 2024
Filed:
Aug. 11, 2021
Fortifyiq, Inc., Newton, MA (US);
FortifyIQ, Inc., Newton, MA (US);
Abstract
A method for testing an HMAC implementation for vulnerability to a side-channel attack can include mounting a template attack. The attack can include generating, based on first side-channel leakage information associated with execution of a hash function of the HMAC implementation, a plurality of template tables. Each template table can correspond, respectively, with a subset of bit positions of an internal state of the hash function. The attack can further include generating, based on second side-channel leakage information, a plurality of hypotheses for an internal state of an invocation of the hash function based on a secret key. The method can further include generating, using the hash function, respective hash values generated from each of the plurality of hypotheses and a message. The method can also include comparing each of the respective hash values with a hash value generated using the secret key to determine vulnerability of the HMAC implementation.