Patent ID: 6708275
Filing Date: 2004-03-16
Classification: H04L,H04Q

Abstract:
A method for the transmission of confidential connection establishment and/or service information between subscriber-side data terminals and at least one digital exchange of a digital communication network, the connection establishment and/or service information being useable by the digital exchange for establishing a connection with the subscriber and/or making a requested service available, the network having at least one subscriber-side network terminator for connecting at least one data terminal, with at least one first security device arranged at a subscriber, and at least one second security device assigned to the exchange, the method comprising the steps of:encoding and/or decoding the connection establishment and/or service information using the first security device; transmitting the encoded connection establishment and/or service information between the first security device and the second security device over a separate control channel of the digital communication network; encoding and/or decoding the connection establishment and/or service information by the second security device; and establishing, using the digital exchange in response to the decoded connection establishment and/or service information the connection with the subscriber and/or making the requested service available.