Method for preparing a restricted access service e.g. for pay-TV via mobilephone terminal, involves decoding message for testing reception validity in terminal device

摘要

A method for preparing at least one restricted-access service involves initially providing a terminal device (3) for the user for communication via a telecommunication network (9), a transmitting device (2) is provided with a user-specific secret key(S1), followed by transmitting messages encoded with the secret key to the terminal device (3), and then decoded and messages for testing the reception authorization (ECM) are encoded with the secret key and passed to a decoder (1) for the user. The message for testing the reception validity (ECM) is then decoded in the terminal device (3) with the secret key (S1), and the pre-assigned reception parameters for handling the reception authorization (EMM) are compared with the reception parameters for testing the reception parameters authorization in the terminal device (3), and the decoded message for testing the reception authorization is passed to the decoder (1) in the event of agreement of the respective reception para meters. An Independent claim is included for a communication device.