×

Method and apparatus for protecting designs in SRAM-based programmable logic devices and the like

  • US 8,566,616 B1
  • Filed: 09/10/2004
  • Issued: 10/22/2013
  • Est. Priority Date: 09/10/2004
  • Status: Active Grant
First Claim
Patent Images

1. A method comprising:

  • receiving at a configurable device a configuration of a protection circuit, wherein the protection circuit is a portion of the configurable device after the configurable device is configured;

    receiving at the configurable device a plurality of secure device encrypted sequence values, the secure device encrypted sequence values generated by a secure device authorization code generator that is separate from the configurable device;

    generating a plurality of configurable device encrypted sequence values, wherein said generating is performed by the protection circuit of the configured configurable device; and

    comparing the plurality of secure device encrypted sequence values with the plurality of configurable device encrypted sequence values; and

    further comprising enabling operation of an electronic design when the plurality of secure device encrypted sequence values are identical to the plurality of configurable device encrypted sequence values.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×