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:
Dec. 20, 2016
Filed:
Sep. 29, 2011
Karl Ackerman, Topsfield, MA (US);
Marten Erik Van Dijk, Somerville, MA (US);
Ari Juels, Brookline, MA (US);
Emily Shen, Thousand Oaks, CA (US);
Karl Ackerman, Topsfield, MA (US);
Marten Erik van Dijk, Somerville, MA (US);
Ari Juels, Brookline, MA (US);
Emily Shen, Thousand Oaks, CA (US);
EMC IP Holding Company LLC, Hopkinton, MA (US);
Abstract
A first cryptographic device is authenticated by a second cryptographic device. The second cryptographic device stores an alternative version of a secret value associated with the first cryptographic device as a countermeasure to compromise of the secret value. In conjunction with a protocol carried out between the first cryptographic device and the second cryptographic device, the second cryptographic device determines the secret value based at least in part on the alternative version of the secret value, and utilizes the determined secret value to authenticate the first cryptographic device. The alternative version of the secret value may comprise a randomly-skewed version of the secret value. For example, the secret value may comprise a key or other parameter of the first cryptographic device and the alternative version of the secret value may comprise a randomly-skewed version of the key or other parameter.