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Method and apparatus for protecting against side channel attacks against personal identification numbers

  • US 20030229598A1
  • Filed: 06/05/2002
  • Published: 12/11/2003
  • Est. Priority Date: 06/05/2002
  • Status: Active Grant
First Claim
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1. A method for private personal identification number (PIN) management, the method comprising:

  • receiving a first PIN;

    receiving a first key used to scramble a second PIN that has been validated;

    receiving a first scrambled PIN comprising said second PIN scrambled with said first key;

    scrambling said first PIN with said first key to create a second scrambled PIN; and

    validating said first PIN based at least in part on whether said first scrambled PIN matches said second scrambled PIN.

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