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:
Jun. 06, 2006
Filed:
Nov. 28, 2000
Stephen M. Trimberger, San Jose, CA (US);
Raymond C. Pang, San Jose, CA (US);
Walter N. Sze, Saratoga, CA (US);
Stephen M. Trimberger, San Jose, CA (US);
Raymond C. Pang, San Jose, CA (US);
Walter N. Sze, Saratoga, CA (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
It is sometimes desirable to encrypt a design for loading into a PLD so that an attacker may not learn and copy the design as it is being copied into the PLD. According to the invention, a method for generating a bitstream for storing an encrypted design begins by generating an unencrypted bitstream including bits representing the design and bits that control loading of the design. The bits representing the design are encrypted and are combined with the bits that control loading, which are not encrypted.