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Recently with the emergence of mobile sensor networks, localization for such networks has gained much attention, and many localization algorithms have been proposed. Among them the sequential Monte Carlo (SMC) based algorithms are very popular because of their simplicity and efficiency. However, most current SMC-based localization algorithms implicitly assume there is no attacker in the network, which...
Sensors' locations are important to many wireless sensor networks (WSNs). When WSNs are deployed in hostile environments, two issues about sensors' locations need to be considered. First, the attackers may attack the localization process to make the estimated locations incorrect. Second, since sensor nodes may be compromised, the base station may not trust the locations reported by sensor nodes. Researchers...
Many secure localization algorithms have been proposed. In these algorithms, collusion attack is usually considered as the strongest attack when evaluating their performance. Also, for ensuring correct localization under the collusion attack, a necessary number of normal beacons are needed and a lower bound on this number has been established (assuming the errors of distance measurements are ignorable)...
Clustering has been widely used in wireless ad hoc networks for various purposes such as routing, broadcasting and Qos. Many clustering algorithms have been proposed. However, most of them implicitly assume that nodes behave honestly in the clustering process. In practice, there might be some malicious nodes trying to manipulate the clustering process to make them serve as clusterheads, which can...
This paper discusses the network covert timing channel. This channel modulates network packet's time properties to transfer information secretly. Much work has been done in inventing and utilizing network covert timing channels, however, there is not so much work in other areas such as detecting and handling covert channels. Covert channel detection is difficult, what's more, it often needs human...
The performance of autonomous networks depends on collaboration among distributed entities. To enhance security in autonomous networks, it is important to correctly revise the trustworthiness of recommendations of entities since trust management is the main foundation of collaboration while it faces many new attacks. In this paper, new attacks against trust evaluation are identified and relationships...
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