ABSTRACT
Unattended wireless sensor networks (UWSNs) are operated in hostile environments without continuous supervision by a trusted data sink, so these networks face the risk of being compromised by threats and adversaries. This chapter proposes a cooperative hybrid self-healing randomized distributed (CHSHRD) scheme, where there is a new mechanism to enhance the confidentiality of the data collected by the network. It uses both types of peers, reactive and proactive, to enhance data reliability and secrecy. Zooming into the problem of data secrecy, consider that a sensor is compromised for a certain duration. The chapter presents a powerful, realistic, and agile adversary model and shows how the CHSHRD scheme can result in the sensor regaining secrecy and achieving high data reliability, in spite of the adversary's efforts to do the contrary. It presents the UWSN system model. UWSNs have become the subject of attention in the security research community.
