Tolerance of Flooding Attacks in Delay Tolerant Networks

Abstract

A delay-tolerant network is a network which is designed to operate efficiently over extreme distances such as those in space communications.In these environments, latency is the major factor affecting the overall quality of network. However, this problem can also occur over small distances where interference of external entities is extreme or re- sources are overburdened. Delay tolerant network is the network in which neither the nodes in the network are constantly connected to each other nor any specialized net- work infrastructure is available for managing the network.By not having a specialized communication infrastructure DTNs are already facing some major challenges like com- munication delay,data dissemination and routing but another major challenge for DTN is to protect the network nodes from the attackers.Existing mechanisms provide security to a good extent but they are using a complex hashing algorithm which takes signifi- cant amount of time ultimately affecting the limited bandwidth and limited battery life of mobile nodes.So the main aim of this project is to design such an algorithm which is less computationally complex and more effective for detecting and tolerating flooding attacks.So I have proposed an algorithm which maintains the information of a node in a map(i.e.HashMap) and monitors the map whenever a transmission occurs. Traversing a map requires less computation and traversal time.As a result of this algorithm, many parameter values like delivery probability, overhead ratio ,etc. show improvised values.