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Configuration stream encryption

  • US 5,970,142 A
  • Filed: 08/26/1996
  • Issued: 10/19/1999
  • Est. Priority Date: 08/26/1996
  • Status: Expired due to Term
First Claim
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1. A method of communicating encrypted configuration data between a programmable logic device (PLD) and a storage device, the method comprising the following steps:

  • (a) storing original configuration data for the PLD in the storage device;

    (b) pseudo-randomly generating a key in the PLD;

    (c) transmitting the key from the PLD to the storage device;

    (d) in the storage device, using the key, generating encrypted configuration data from the original configuration data stored in the storage device;

    (e) transmitting the encrypted configuration data from the storage device to the PLD;

    (f) decrypting the encrypted configuration data in the PLD using the key to generate a copy of the original configuration data; and

    (g) original configuring the PLD using the copy of the original configuration data produced by the decrypting step (f).

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