Patent ID: 8234716

Claim:
A method for transmitting user data between a first communication device, which uses encryption, and a second communication device, comprising: initiating transfer by the first communication device towards the second communication device of a direct connection setup message with a first direct connection address identifying an encryption device and an encryption message specifying the encryption with a second direct connection address identifying the first communication device; determining, based on the encryption message, whether the second communication device supports the encryption specified; if the second communication device supports the encryption specified, setting up a first direct connection between the second communication device and the first communication device based on the second direct connection address, and transmitting the user data over the first direct connection in encrypted form; and if the second communication device does not support the encryption specified, setting up a second direct connection between the second communication device and the encryption device based on the first direct connection address and transmitting the user data by way of the second direct connection to the encryption device for encryption and forwarding of the user data in encrypted form to the first communication device.