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Fingerprint controlled public key cryptographic system

  • US 5,832,091 A
  • Filed: 03/14/1996
  • Issued: 11/03/1998
  • Est. Priority Date: 09/07/1994
  • Status: Expired due to Term
First Claim
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1. A public key cryptographic system, comprising:

  • a body part input for generating an information signal impressed with characteristics of a body part;

    Fourier transform means to obtain a Fourier transform representation of said information signal;

    a programmable filter responsive to said Fourier transform means for filtering said Fourier transform representation of said information signal to obtain a filtered Fourier transform representation;

    a reader for reading data from a data carrier storing filter information and for programming said programmable filter with said filter information data;

    inverse transform means responsive to said filter to inverse Fourier transform said filtered Fourier transform representation to obtain an inverse transform representation;

    key generating means responsive to said inverse transform means for generating a private key for decrypting a public key encrypted message.

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