| 摘要 |
A process and device is disclosed to authenticate subscribers to one or several exchanges of a digital communications network, in particular an ISDN network. Since the lines of communication between the subscriber connections and the exchanges are not protected, there is a danger of intrusion or eavesdropping by unauthorised persons. The object of the invention is therefore to make misuse of the exchange by unauthorised persons difficult or even impossible. For that purpose, a device for authenticating subscribers to one or several exchanges of a digital communications network has at least one subscriber network termination to which at least one data terminal may be connected. The invention is characterised in that at least one first authentication module is provided for each subscriber and can receive a first identification carrier, and in that at least one second authentication module that can receive a second identification carrier is provided at the exchange. Alternatively, a supplementary system is connected between the network terminations associated with the exchange and the exchange itself. The supplementary system contains at least one second authentication module that can receive a second identification carrier. The authentication modules can code and/or decode information by means of an individual, subscriber-specific code, in order to authenticate it unilaterally and/or bilaterally, and can exchange information with each other.
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