CPC H04W 12/041 (2021.01) [H04L 63/18 (2013.01); H04W 12/06 (2013.01)] | 4 Claims |
1. A communication terminal comprising:
at least one processor; and
at least one memory operatively coupled with the processor, wherein the at least one processor is configured to:
initiate registration in a network node over 3GPP access and Non-3GPP access; and
establish a first Non-Access Stratum (NAS) connection for the 3GPP access and a second NAS connection for the Non-3GPP access with the network node in a network,
wherein the first NAS connection is specified by a first parameter,
wherein the second NAS connection is specified by a second parameter,
wherein the first parameter and the second parameter are for NAS security,
wherein the first parameter is a first fixed value corresponding to the 3GPP access,
wherein the second parameter is a second fixed value corresponding to the Non-3GPP access, and
wherein the at least one processor is further configured to:
derive a first security key using at least the first fixed value;
derive a second security key using the first security key; and
protect a Radio Resource Control (RRC) message using the second security key.
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