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User authentication based on asymmetric cryptography utilizing RSA with personalized secret

  • US 20070081667A1
  • Filed: 10/06/2006
  • Published: 04/12/2007
  • Est. Priority Date: 10/11/2005
  • Status: Active Grant
First Claim
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1. A method for user authentication based on asymmetric cryptography, comprising:

  • providing a first input and a second input from a user who requests an access to a computer system;

    authorizing the access when the first input matches a personalized secret and the second input matches a crypto-key authenticator comprising a public modulus, a public exponent, and a private-key-dependent exponent; and

    changing the personalized secret to a new secret and updating the private-key-dependent exponent while keeping the public modulus and the public exponent unchanged.

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