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System and Method for Secure Data Disposal

  • US 20090070598A1
  • Filed: 09/10/2007
  • Published: 03/12/2009
  • Est. Priority Date: 09/10/2007
  • Status: Active Grant
First Claim
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1. A machine-implemented method comprising:

  • initializing one or more first data areas in a nonvolatile data area, wherein the first data areas are secured by a security subsystem, wherein the initializing is performed by;

    generating a random number;

    storing the generated random number in a nonvolatile memory;

    seeding one or more of the first data areas with the generated random number;

    inputting a plurality of startup code processes to a hash algorithm process resulting in a first plurality of hash values;

    updating the first data areas using the first plurality of hash values; and

    saving the first data areas in the nonvolatile data area that is secured by the security subsystem; and

    booting the machine one or more times after the initializing, during each of the boots;

    retrieving, by the security subsystem, the previously stored random number from the nonvolatile memory;

    seeding one or more second data areas with the retrieved random number;

    inputting the plurality of startup code processes to the hash algorithm process resulting in a second plurality of hash values;

    updating the second data areas using the second plurality of hash values; and

    decrypting an encrypted data object in response to the second data areas being the same as the corresponding first secure data areas.

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