Patent ID: 9369490
Filing Date: 2016-06-14
CPC Classification: H04L,H04W

Claim Text:
1. A method, implemented in an ad-hoc network implementing an Xcast broadcasting service for a secure exchange of a data from a sender node, sending the data, to a list of receiver nodes, receiving the data, a communication topology of the network being defined by a communication graph, wherein the method comprises: providing a security graph of the network, that defines a security topology for the network; routing, on the basis of the security graph, the data between the sender node sending the data and each receiver node receiving the data along a secure route on the security graph, the routing being implemented via the Xcast broadcasting service in which the sender node addresses the list of receiver nodes; generating, between a relay node and a subsequent relay node of the secure route, an appropriate message, containing the data protected in accordance with a security association shared between the relay node and the subsequent relay node; and routing, on the basis of the communication graph, the message from the relay node to the subsequent relay node along a communication route on the communication graph, the security graph comprising: