Operation of a serving node in a network

A method of operating a first base station in a telecommunications network, comprising:

• receiving a handover request for handover of a terminal from a source base station, the handover request including security capabilities of the terminal;
• selecting security algorithms for use in communications between the first base station and the terminal following the handover, the selection of the security algorithms being based on the received security capabilities of the terminal;
• sending a path switch request to a serving node, the path switch request including the security capabilities of the terminal;
• receiving a first message comprising replacement security capabilities of the terminal;
• and
• sending a second message to a second base station, wherein the second message comprises the replacement security capabilities of the terminal.

A computer program product comprising a non-transitory computer readable medium storing a computer program for a first base station in a telecommunications network, said computer program comprises code which run by a processor causes said processor to:

• receive a handover request for handover of a terminal from a source base station, the handover request including security capabilities of the terminal;
• select security algorithms for use in communications between the first base station and the terminal following the handover, the selection of the security algorithms being based on the received security capabilities of the terminal;
• send a path switch request to a serving node, the path switch request including the security capabilities of the terminal;
• receive a first message comprising replacement security capabilities;
• and
• sending a second message to a second base station, wherein the second message comprises the replacement security capabilities of the terminal.