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Cryptographic device with resistance to differential power analysis and other external monitoring attacks

  • US 8,707,052 B2
  • Filed: 02/08/2013
  • Issued: 04/22/2014
  • Est. Priority Date: 12/04/2009
  • Status: Active Grant
First Claim
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1. A device comprising:

  • storage hardware to store a secret value; and

    processing hardware, coupled to the storage hardware, to;

    derive a message key for a message based at least in part on the secret value and a message identifier of the message, wherein the message key is derived using a plurality of entropy distribution operations;

    encrypt a data segment of the message using an encryption key derived from the message key to produce an encrypted data segment;

    compute a validator based on the secret value and the encrypted data segment; and

    output the encrypted data segment and the validator.

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