Client device for transmission of voice data over voice channel, has voice recognition part for detecting voice input of authentication code provided by user, for judging termination of voice channel

摘要

The device (10) has an authentication code providing part for providing an authentication code e.g. part of hash value, to a user of the device, based on a key i.e. symmetric key. The key is provided by a key establishing protocol e.g. cryptographic key-agreement protocol. A voice recognition part detects a voice input of the code provided by the user, for judging termination of a voice channel (SK). A generating part generates the key based on a random number provided by a single random number generator. Independent claims are also included for the following: (1) an arrangement for transmission of voice data over a voice channel (2) a method for transmission of voice data over a voice channel (3) a computer program product for performing a method for transmission of voice data over a voice channel.