A Solution for Prevention of Selective Dropping and Selfish Attacks in Opportunistic Networks

摘要

Opportunistic Networks (OppNet) are based on routing messages from a node to another node, from a source to the destination. There is not a connection to the Internet in these networks and nodes play routers role, So it is important that all of the nodes participate in the routing protocol. These networks have high potential to vulnerable against "Dropping and Selective Dropping Attacks" and "Selfish attacks". Some nodes may prefer to discard some messages in order to save their Battery life, memory space and so on, while they use the network services. It causes an interruption in the network and makes a high delay for messages. In this paper, we propose a new method based on Game Theory to prevent these attacks against OppNet, and we will prove that our strategy is a Nash equilibrium. Also we will discuss that our algorithm is resistance against various attacks.