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Protection of the execution of an algorithm against side-channel attacks

  • US 9,565,016 B2
  • Filed: 10/22/2014
  • Issued: 02/07/2017
  • Est. Priority Date: 10/23/2013
  • Status: Active Grant
First Claim
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1. A method to protect execution of an encryption algorithm, comprising:

  • updating a counter before execution of the encryption algorithm, the counter configured for storage in a reprogrammable non-volatile memory; and

    storing a value of the counter into the reprogrammable non-volatile memory during execution of the encryption algorithm, wherein the storing includes;

    activating a write function of the reprogrammable non-volatile memory;

    writing a value of the counter in the reprogrammable non-volatile memory, the writing of the value corresponding with beginning execution of the encryption algorithm or after execution of the encryption algorithm begins; and

    deactivating the write function of the memory.

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