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Selectively disabled output

  • US 8,604,823 B1
  • Filed: 12/11/2008
  • Issued: 12/10/2013
  • Est. Priority Date: 05/16/2006
  • Status: Active Grant
First Claim
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1. A method of preventing a reading of data on an integrated circuit capable of outputting the data, the method comprising:

  • determining whether to allow a reading of the data based on a setting of a disabling element, wherein once the disabling element is set to not allow the reading of the data, the disabling element cannot be changed to allow the reading of the data;

    encrypting the data, independently of the setting of the disabling element, if the reading of the data is not allowed; and

    subsequent to the encrypting, outputting the encrypted data, wherein the encrypted data is adapted to be decrypted using a key.

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