FIELD: physics, computer engineering.
SUBSTANCE: invention relates to security context signalling. A method for establishing a first security context between a remote station and a serving network, the first security context having a security property that is not supported by a second security context, the method comprising: the remote station forwarding a first message to the serving network, wherein the first message includes an information element; the remote station generating an integrity session key and an encryption session key in accordance with the first security context; the remote station receiving a second message having a message authentication code indicating that the serving network supports the first security context; the remote station verifying the message authentication code using the integrity session key; and the remote station, in response to successful verification of the message authentication code, performs wireless communication protected by the encryption session key.
EFFECT: providing signalling on support of an improved security context.
31 cl, 8 dwg
