Optimization of unstable multihop wireless communication networks with digital forensics

Multihop wireless network is in the minority among popular networks which are open to the public, although they have been often researched and proposed. One of the reasons lies in a problem in security. It is easy to protect message on communication in terms of confidentiality when all of the nodes are under the control of one user. In such case as sensor networks, malicious nodes are out of consideration. However, when a network is open to the public, a matter of security would be complicated since attacks and falsification might occur inside the network. Furthermore, detection and elimination of malicious nodes are difficult on an unstable multihop wireless network where nodes continuously move and some of them frequently join or leave the network. Therefore, in this paper, we propose a method for secure protocols to make an unstable multihop wireless network securely. The three elements in security are confidentiality, integrity and availability. In addition, we put a stress on authenticity and forensics on the network. The method contributes congestion control for unstable multihop wireless networks while keeping the network secure.