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Physical presence determination in a trusted platform

  • US 20040205362A1
  • Filed: 04/10/2003
  • Published: 10/14/2004
  • Est. Priority Date: 04/10/2003
  • Status: Active Grant
First Claim
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1. Apparatus comprising:

  • a trusted platform module (TPM);

    a nonvolatile memory having computer readable program code stored therein; and

    a circuit board which couples said TPM and said nonvolatile memory and which includes a processor which executes the code stored in said nonvolatile memory and further includes a status register which assumes a power-on status state which indicates how the application of power to said circuit board was last previously initiated;

    wherein the processor, when executing the code stored in said nonvolatile memory, is effective to;

    read the power-on status state of the status register;

    determine whether the application of power to said circuit board was last previously initiated by the activation of a power-on switch coupled to said circuit board based on the power-on status state as read from the status register; and

    issue a command which affects the operation of said TPM as a function of the determined power-on state.

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