Intrusion-tolerant framework for heterogeneous Wireless Sensor Networks

Attacks against wireless sensor networks (WSNs) are becoming more and more frequent. Due to the sensitive nature of these networks, appropriate security mechanisms should therefore be developed. This paper introduces a fault-tolerant approach for WSNs. The basic idea to detect malicious nodes is to proceed to intermediate verification of the signed messages within the communication paths. A tolerance state is defined in which a set of tests are performed on the malicious node in order to definitely reject it or rehabilitate it.