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Encryption key obfuscation and storage

  • US 7,734,043 B1
  • Filed: 01/25/2005
  • Issued: 06/08/2010
  • Est. Priority Date: 01/25/2005
  • Status: Expired due to Fees
First Claim
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1. A method of protecting a configuration bitstream, the method comprising:

  • encoding at least a portion of a configuration bitstream using a first key to generate an encoded configuration bitstream;

    storing the encoded configuration bitstream in a first memory on a first integrated circuit;

    receiving, at a first circuit of a second integrated circuit, the first key, wherein the first key is received at the second integrated circuit from a source external to the second integrated circuit;

    obfuscating, with the first circuit, the first key to generate a second key; and

    storing the second key in a second memory on the second integrated circuit, wherein the second memory is a non-volatile memory.

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