Secure negotiation of authentication capabilities

摘要

592061 Disclosed is a communications network (20). The network includes a server (24) configured to use authentication capabilities information of a terminal (30), or a value derived from the authentication capabilities information, as input to a function to determine a first cryptographic value. The authentication capabilities information provides an indication of authentication capabilities of the terminal (30). An authentication node (22) makes verification of an authentication procedure for the terminal (30) using the first cryptographic value to complete the authentication procedure before security capabilities are used.