Electronic code locking mechanism, especially the deactivation o

Details Electronic code locking mechanism, especially the deactivation o Electronic code locking mechanism, especially the deactivation o

1995-03-10

1998-04-21

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

70278, 70460, 180287, 2353825, 307 105, 340426, 34082534, B60R 2504

Patent

active

057422362

ABSTRACT:
A code locking mechanism that transmits information between a key and a locking mechanism secured against interception misuse, but flexible with respect to original equipment, replacement parts, and emergency functions, is obtained if the key code is, in each case, cryptographically encoded through a hardware encoder. When the locking mechanism is first operated, a control element, inductively coupled to a locking mechanism read-write unit with a new key once and in a non-overwritable manner, transmits an indent number to the object memory. Object-specific identity data are also stored in the control element. With the latter, a key number from a key register of the control element is combined with the key code to read the latter together with a roll-in random code into the set of first still-neutral keys and into the object memory. Thus, a key is valid only if the object-specific identity data are taken into account in its key code. This is possible only through programing via a credit card-like control element which, as the only valid specimen, once has been allocated to the specific object in a fixed way after the locking mechanism is operated, or a component is replaced.

REFERENCES:
patent: 3732465 (1973-05-01), Palmer
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patent: 4189712 (1980-02-01), Lemelson
patent: 4366466 (1982-12-01), Lutz
patent: 4451887 (1984-05-01), Harada et al.
patent: 5019812 (1991-05-01), Gostahagberg et al.
patent: 5311757 (1994-05-01), Spahn
patent: 5397884 (1995-03-01), Saliga
patent: 5477214 (1995-12-01), Bartel
European Search Report, Jul. 10, 1995.

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