Security system comprising three apparatuses sharing a time-vary

Details Security system comprising three apparatuses sharing a time-vary Security system comprising three apparatuses sharing a time-vary

1995-03-07

1997-09-30

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

34082534, 34082572, 235382, 380 21, 380 25, 380 28, H04L 914

Patent

active

056730349

ABSTRACT:
Complex, time varying codes (e.g., pseudo-random sequences) are used in an access regulating system that includes three types of synchronized apparatuses. The first apparatus is a central computer, or other suitable means that issues a set of time-dependent code segments to a plurality of the second, linking, type of apparatus (which may comprise end-user communication equipment). The codes are relayed by the linking apparatus to the third, access granting, apparatus that grants access (e.g., to a communication network) only if there is a match between the code from the linking apparatus and a code stored in the access granting apparatus.. The time-varying code segments are chosen so that after the expiation of a predetermined interval none of the code segments in the linking apparatus match code segments in the access-granting apparatus.

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