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Personal identification system

  • US 4,214,230 A
  • Filed: 01/19/1978
  • Issued: 07/22/1980
  • Est. Priority Date: 01/19/1978
  • Status: Expired due to Term
First Claim
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1. For use in a system for providing transaction security to a cardholder'"'"'s account in a commercial institution, wherein the cardholder has a secret identification number, and the institution has a secret number, the combination comprising:

  • means having a data input, a data output and a key input, for enciphering clear data applied at said data input under control of a key comprised of key bits applied at said key input, in accordance with an enciphering process;

    means for applying a customer account number to the data input of said enciphering means; and

    ,means for applying at the key input the combination of said customer'"'"'s secret number and said institution'"'"'s secret number,whereby a first cipher is generated at the output of said enciphering means.

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