Importance

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Abstract

A method for the authentication of a user for use of a service offered via a first communication system, with the user being authenticable by an authentication unit that can be unambiguously assigned to the user, and enables authentication of the user in a second communication system. Information on the authentication unit being available in a service device, with the second communication system communicating the data enabling authentication of the user. The service device transmits data to the authentication unit, enabling authentication of the user, whereby a response, specific to an authentication unit occurs. A check for correctness of the response specific to the authentication unit taking place in the first communication system or in the second communication system occurs, and communication corresponding to the service taking place between the user station and the first communication system occurs, depending on the result of the check.

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First Claim