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. 17, 2015
Filed:
Feb. 10, 2012
Edward S. Peterson, Rio Rancho, NM (US);
Jason J. Moore, Albuquerque, NM (US);
Edward S. Peterson, Rio Rancho, NM (US);
Jason J. Moore, Albuquerque, NM (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
Approaches for restricting the use of an integrated circuit (IC) are described. In response to receiving an encrypted configuration bitstream, a cryptographic key is retrieved from an internal memory of the IC and the encrypted configuration bitstream is decrypted using the cryptographic key to produce a decrypted configuration bitstream. A first signature value of the decrypted configuration bitstream is calculated. A second signature value is retrieved from a write-once memory of the IC. In response to the first signature value being different from the second signature value, configuration of the IC with the bitstream is prevented. In response to the first signature value being equal to the second signature value, configuration of the IC with the bitstream is permitted.