Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular node for directing data and applying cryptography
Reexamination Certificate
1999-01-26
2001-10-16
Peeso, Thomas R. (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular node for directing data and applying cryptography
C713S170000, C713S169000, C713S162000
Reexamination Certificate
active
06304968
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method and device for allocating an authentication device to a base station.
BACKGROUND INFORMATION
German Patent Application No. 196 45 769 describes a method for allocating a authentication device to a base station. An authentication device designed as a remote control is allocated to a base station belonging to a motor vehicle in particular in a two-step method, the base station emitting a search signal in a first allocation step to detect any authentication devices present within the signal range. Any authentication devices present will receive the search signal, compare it with a reference signal stored in a memory and respond by sending back a “present” signal if the search signal and reference signal match. This sending back takes place at a time which is characteristic of the respective authentication device sending it back and is based on receipt of the call signal. The base station can unambiguously identify which authentication elements are present on the basis of this characteristic time. It then selects one of those present and performs an allocation verification in the second allocation step. This method makes it possible to allocate multiple authentication devices to one base station, and to guarantee that the allocation will be performed rapidly.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a method for allocating an authentication device multiple base stations.
The method according to the present invention permits allocation of one authentication device to multiple base stations, such as the allocation of one remote control to multiple motor vehicles, to various buildings or to both buildings and vehicles at the same time, without a user having to perform special actions. This method works very rapidly since at first an authentication device to be allocated is merely recognized directly on the basis of a search signal delivered by the base station after a unilateral signal transmission, and only then is the allocation verified. It is also advantageous that the number of base stations that can be allocated to one authentication device may be limited to a number suitable for the intended application.
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Hacker Heidrun
Schmitz Stephan
Jack Todd
Kenyon & Kenyon
Peeso Thomas R.
Robert & Bosch GmbH
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