Method and system for dynamically constructing and controlling short-lived communication groups with secure transmission

摘要

The method involves sending a broadcast message (BC) which includes a group identifier, and an identifier (IDI) of the initiator node (IKN), information about the communications group and contains and address (ADRl) of the initiator node. A unicast message (UC1) is received and participating nodes (KN) are authenticated by the initiator nodes. Another unicast message (UC2), which comprises a multicast identification (MC ID) as well as a safety key at each node, participating in communications groups, by the initiator-nodes is dispatched. An independent claim is also included for a node for dynamic set up and control of the communication group.