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Trusted bus transactions

  • US 7,650,645 B1
  • Filed: 05/20/2005
  • Issued: 01/19/2010
  • Est. Priority Date: 05/21/2004
  • Status: Active Grant
First Claim
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1. A method of performing a trusted access to a memory using a device comprising:

  • receiving a random number over a bus;

    providing an authentication for the device by encrypting the random number and providing the encrypted random number over the bus, the authentication for the device provided to receive an assertion of a level of trust;

    receiving the assertion of a level of trust over the bus;

    receiving an instruction over the bus, the instruction instructing the device to access the memory;

    providing a memory access request over the bus;

    upon verification that an instruction to request memory access was provided to the device;

    receiving data over the bus; and

    receiving a de-assertion of the level of trust over the bus.

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