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Integrated circuit chip for encryption and decryption having a secure mechanism for programming on-chip hardware

  • US 20060059372A1
  • Filed: 09/10/2004
  • Published: 03/16/2006
  • Est. Priority Date: 09/10/2004
  • Status: Abandoned Application
First Claim
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1. An integrated circuit chip for providing cryptographic functionality, said chip comprising:

  • a first, volatile random access memory;

    at least one processor;

    at least one cryptographic engine for performing encryption and decryption;

    an interface for receiving externally supplied requests and data and for returning results;

    at least one fixed cryptographic key present on said chip; and

    a flow control circuit, having at least a portion thereof comprising programmable hardware, said flow control circuit being connected to said interface for routing data between said interface, said at least one processor, said random access memory, and said at least one cryptographic engine in a manner in which encrypted instructions are supplied through said interface in encrypted form and are decrypted by said at least one cryptographic engine using said fixed cryptographic key and are used to program said portion of said flow control circuit having programmable hardware.

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