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Biometric certificates

  • US 6,310,966 B1
  • Filed: 05/08/1998
  • Issued: 10/30/2001
  • Est. Priority Date: 05/09/1997
  • Status: Expired due to Term
First Claim
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1. A method for authenticating an electronic transaction involving a user, comprising the steps of:

  • registering a user, including the steps of;

    receiving a registration set of physical characteristics of the user at a biometric input device;

    generating registration biometric data corresponding to the registration set of physical characteristics;

    generating a biometric certificate from the registration biometric data, user input data, a public key of the user, and a digital signature; and

    storing the biometric certificate in a biometric database;

    transmitting an electronic transaction over a network, the electronic transaction including transaction biometric data, transaction first data, and a digital signature generated from the transaction biometric data and the transaction first data, the step of transmitting including the steps of;

    receiving a current set of physical characteristics of the user;

    generating the transaction biometric data from the current set related to the physical condition of the user;

    generating a first hash value signal from the transaction first data and the transaction biometric data;

    generating the digital signature from the hash value and a private key signal of the user;

    transmitting the digital signature over the network; and

    transmitting the transaction biometric data and the transaction first data over the network; and

    authenticating the electronic transaction, including the steps of;

    receiving the digital signature, the transaction biometric data and the transaction first data from the network;

    retrieving user identification (ID) data from the transaction first data;

    retrieving a biometric certificate, corresponding to the user ID data, from the biometric database;

    extracting the registration biometric data and the user public key from the biometric certificate;

    decrypting the digital signature using the user public key to retrieve the first hash value from the digital signature;

    generating a second hash value from the transaction biometric data and the transaction first data;

    comparing the first hash value to the second hash value using a first classifier;

    generating a first validation signal to authenticate the transmission of the transaction first data and the transaction biometric data based on the comparison by the first classifier;

    comparing the registration biometric data and the transaction biometric data using a second classifier; and

    generating a second validation signal to authenticate the user based on the comparison by the second classifier.

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