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Cryptographic chip and related methods

  • US 10,237,065 B2
  • Filed: 03/31/2014
  • Issued: 03/19/2019
  • Est. Priority Date: 03/31/2014
  • Status: Active Grant
First Claim
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1. A chip for performing cryptographic operations, the chip comprising:

  • a key storage module configured to store one or more cryptographic keys;

    a rule storage module configured to store one or more rules, each rule comprising respective rule data, the rule data identifying a respective predetermined cryptographic operation associated with the rule and further identifying at least one of the one or more cryptographic keys to be used in the respective predetermined cryptographic operation;

    an interface module configured to receive a rule execution request, wherein the rule execution request comprises a rule identifier to identify a specific rule of the one or more rules to be executed; and

    a cryptographic module configured to execute the specific rule so as to perform the respective predetermined cryptographic operation in response to the rule execution request;

    wherein the chip is configured such that the cryptographic keys and the cryptographic module may only be used by executing rules from the one or more rules in response to associated rule execution requests received by the interface module;

    wherein the interface module is configured to receive the rule execution request from other circuitry included on the chip or from externally of the chip and wherein the interface module is further configured to assess whether the rule execution request is allowable;

    wherein the cryptographic module is configured to execute the specific rule so as to perform the respective predetermined cryptographic operation in response to the rule execution request having been assessed as allowable by the interface module and not execute the specific rule in response to the rule execution request having been assessed as not allowable by the interface module.

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