Security system with security access database distributed among

Details Security system with security access database distributed among Security system with security access database distributed among

1992-10-14

1994-06-07

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082532, 34082534, 340542, 2353825, G06F 704, E05B 4506, G06K 701

Patent

active

053193628

ABSTRACT:
An electronic security system includes a controller for controlling access to a location through activation of a lock mechanism in response to coded data and command instructions read from a key or card containing an electronic memory. The key memory data includes information specific to the keyholder which is decoded and acted upon by the controller. The controller memory can be reduced in size while still allowing the use of a large number of keys, by distributing a larger amount of data to the key memories. The controller is also capable of writing and altering key memory data in real time to control the subsequent use of the key.

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