Method and device for ensuring reliable collection of data relating to the use of a communications system

摘要

To ensure that a subscriber in a communications system is billed by the operator of the system only for actual use of the system and to allow detection of unauthorised access to the system, the invention proposes a method of ensuring reliable collection of data relating to the use of at least one such communications system by at least one first subscriber. The proposed method involves authentication of the data relating to the use of the system by the first subscriber in relation to the operator. A device of the type proposed is characterised by a security device connected to a terminal, the purpose of the security device being to authenticate data relating to the use of the communications system by the first subscriber in relation to the operator.