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Electronic bolt lock with enhanced security features

  • US 5,170,431 A
  • Filed: 09/20/1991
  • Issued: 12/08/1992
  • Est. Priority Date: 09/20/1991
  • Status: Expired due to Term
First Claim
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1. An electronic bolt lock comprising:

  • a bolt;

    electronic controls;

    internal, self contained electrical power generating means for electrically powering said electronic controls;

    a key cylinder;

    a key insertable into said key cylinder and comprising a data storage means for storing at least a code for accessing and opening said lock;

    means connectable to said key cylinder to withdraw said bolt;

    said electronic control means further comprising means for creating a new access code and encrypting said code upon each successful operation of said lock;

    means for storing a unique identifier for said key in said key;

    means for storing a unique identifier for said lock in said lock;

    said means for creating and encrypting further comprising means for encrypting said key identifier as a step in said encrypting;

    means for storing said new access code in encrypted form in both said lock and said key for use in accessing said lock on the next operation of said lock by said key.

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