METHOD FOR AGREEING ON A SECURITY KEY BETWEEN AT LEAST ONE FIRST AND ONE SECOND COMMUNICATIONS STATION FOR SECURING A COMMUNICATIONS LINK

摘要

The current invention addresses the problem of improving the use of suitable measures in a method for agreeing on a security key between at least one first and one second communications station in order to secure a communications link such that the security level for the communication is increased and the improved method can be combined with already available methods. In order to solve that problem, the current invention proposes a method for agreeing on a security key between at least one first and one second communications station for securing a communications link, in which a first parameter is determined from an authentication and key derivation protocol. In addition, an additional parameter is sent securely from the second to the first communications station. A security key is then determined from the first parameter and the additional parameter.