Patent ID: 9226140
Filing Date: 2015-12-29
Classification: H04J,H04L,H04W

Abstract:
1. A user terminal for a cellular network, the user terminal being arranged to carry out one or more security features in its communication with the network, wherein said user terminal is configured to: based at least in part on information received in a signaling message from the network, discover whether the network supports one or more of said security features, wherein the one or more of said security features comprise at least two ciphering capabilities for use in the communication with the network and a procedure for secure selection of one of said ciphering capabilities together with the network, and the information in the signaling message from the network comprises information indicating the network's ability to carry out said secure selection of ciphering capabilities; exchange information with the network in order to enable the use of one or more of said supported security features in the communication and to ensure that the network has correct information regarding the user terminal's security capabilities, wherein the exchange comprises: calculate a second checksum based on the user terminal's ciphering capabilities and perform a predefined action if the first and the second checksums are not equal; and carry out at least one of the one or more of the supported security features in the communication with the network.