FIELD: communication.
SUBSTANCE: invention relates to the field of authentication of a transaction performed by user equipment (hereinafter – UE) of mobile communication that has performed a procedure of authentication and key agreement between UE device and an object of control of guest network mobility to establish a security context between UE device and the guest network. The method includes sending a message from UE device to the guest network confirming the provision of a service, signed by UE device with a digital signature using an integrity protection key used by UE device and a home network, and forwarding the message confirming the provision of the service from the guest network to the home network.
EFFECT: implementation of a mechanism that gives the home network operator a greater degree of control over roaming billing using the TAP procedure by establishing a common secret key for UE device and the home network operator and using this key to generate a message confirming the provision of a service with integrity protection.
9 cl, 3 dwg
