Electronic security system

  • US 5,745,044 A
  • Filed: 04/09/1992
  • Issued: 04/28/1998
  • Est. Priority Date: 05/11/1990
  • Status: Expired due to Term
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First Claim
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1. An electronic security system, comprising:

  • a lock, includinga lock memory storing therein an identification number of said lock, an encryption code associated with said lock, and a seed number, andmeans for encrypting said stored seed number with said encryption code to generate an encrypted seed number;

    key means couplable with said lock for communicating therewith, includinga key memory storing therein a list of lock identification numbers and corresponding encryption codes,means for receiving said identification number of said lock and said seed number from said lock,means for encrypting said received seed number with an encryption code retrieved from said key code corresponding to said received identification number to generate an encrypted seed number, andmeans for transmitting said encrypted seed number to said lock;

    said lock further includingmeans for comparing said encrypted seed number received from said key means with the encrypted seed number generated in said lock, andmeans for enabling said key means to open said lock upon determination by said means for comparing that said encrypted seed numbers match.

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