1 research outputs found
A Distributed Trust Management Scheme for Data Forwarding in Satellite DTN Emergency Communications
Satellite Communications can be used when
other communication systems are either destroyed or overloaded.
Observation satellites and Delay/Disruption Tolerant
Networks are technologies that can be interconnected
to provide emergency communication for disaster recovery
operations. DTNs use a store-carry-forward mechanism
to forward messages through intermediary nodes to the
destination node. The reliability of relaying messages
through multi-hop nodes poses a significant problem in
DTNs due to lack of consistent connectivity. These network
characteristics make DTNs to heavily rely on the cooperation
of neighbouring nodes for the successful delivery of
packets. However, the presence of malicious or selfish nodes
will have a great impact on the network performance. In
this paper, we design a decentralised trust management
scheme (DTMS) to filter out malicious nodes in DTNs.
First, the number of forwarding evidence are combined
with the energy consumption rate of the nodes to formulate
direct trust. Then, a recommendation trust is computed
from the indirect trust, recommendation credibility and
recommendation familiarity. Recommendation credibility
and familiarity improve the overall recommendation trust
by filtering out dishonest recommendations. A comparative
analysis of DTMS is performed against a Cooperative
Watchdog Scheme (CWS), Recommendation Based Trust
Model (RBTM) and Spray & Wait protocol. The results
show that DTMS can effectively deal with malicious
behaviours in DTNs including trust related attacks