Popularity of wireless sensor networks (WSNs) is increasing continuously in different domains of dai ly life, as they provide efficient method of collecting valuable dat a from the surroundings for use in different applications. Rout ing in WSNs is the vital functionality that allows the flow of inf ormation generated by sensor nodes to the base station, while consider ing the severe energy constraint and the limitations of computatio nal and storage resources. Indeed, this functionality may be vulner able and must be in itself secured, since conventional routing proto cols in WSNs provide efficient routing techniques with low power consumption, but they do not take into account the possible atta cks. As sensor nodes may be easily captured and compromised, the classical cryptographic solutions become insufficient to prov ide optimal routing security, especially, for cluster-based WSN s, where cluster heads can be still among the compromised nodes. In this work, we propose a hierarchical, robust and well-adapted int rusion detection system, named THIDS (Threshold Hierarchical Intrusion Detection System), which is intended to be integrated into th e secure hierarchical cluster-based routing protocols. We ha ve chosen the protocol RLEACH to be equipped with the proposed IDS. The results of simulation performed under NS2 simulator show that the resulting protocol ORLEACH is much more resistant to compromised nodes exercising the most dangerous attacks.
['Somia Sahraoui', 'Souheila Bouam']
Secure Routing Optimization in Hierarchical Cluster-Based Wireless Sensor Networks