| 摘要 |
<p>A node is disclosed for use in a system comprising said node (6) and a further node (20). A plurality of different communication channels are provided between said nodes, each communication channel having a different identity. The node comprises means for calculating an authentication code (XMAC-I) from a plurality of values. Some of said values are the same for said plurality of different communication channels, while at least one of said values being arranged to comprise information relating to the identity of a communication channel (RB ID) of said plurality of communication channels. The node further comprises means for receiving information relating to an authentication code (MAC-I) calculated by said further node, and means for comparing information relating to an authentication code (XMAC-I) calculated by said node with information relating to an authentication code (MAC-I) calculated by the further node. <IMAGE></p> |
