Time-accounting system and method comprising means for the gener

Details Time-accounting system and method comprising means for the gener Time-accounting system and method comprising means for the gener

1991-12-10

1993-08-10

Miska, Vit W.

Horology: time measuring systems or devices

Time interval

Parking meter type

235378, 36446401, G04F 100, G06K 1500, G06F 1530

Patent

active

052355659

ABSTRACT:
A device that can be used to check the authenticity of time-accounting systems and devices, and notably of time-accounting devices for reckoning periods of parking regulated by rules. The system is constituted by a plurality of boxes, each held by a distinct user, each box comprising computation means that determine at least two secret codes, the changing from one secret code to another being done substantially at one and the same instant for all of boxes and secret codes being identical for all of boxes substantially at the same instant to enable a checker to ascertain the authenticity of boxes, code-changing instant resulting from a secret computation.

REFERENCES:
patent: 4460965 (1984-07-01), Trehn et al.
patent: 4717815 (1988-01-01), Tomer
patent: 4730285 (1988-03-01), Lie
patent: 4876540 (1989-10-01), Berthon et al.
patent: 5003520 (1991-03-01), Grieu et al.

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