| 摘要 |
The invention relates to a process and a device for transmitting confidential and authentic connection and/or service information between subscribers' data terminals and one or more exchanges of a digital communication system. As this confidential information is transmitted between a subscriber's terminal and an exchange in plain language, i.e. uncoded, there is the risk that intruders or eavesdroppers may receive this information. It is therefore the aim of the invention to make misuse of the exchange and prejudice to the subscriber by an unauthorised person difficult or even completely impossible. To this end the invention provides a process and a device in which there is at least one first security device at at least one subscriber, there is at least one second security device in the exchange or, alternatively, prior to each exchange there is an additional device in which there is at least one second security device. The first and second security devices can encode and/or decode the subscriber's connection and/or service information and exchange it between them.
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