In this paper we discuss misbehavior detection for vehicular ad-hoc networks (VANETs), a special case of cyber-physical systems (CPSs). We evaluate the suitability of existing PKI approaches for insider misbehavior detection and propose a classification for novel detection schemes. Cyber-physical systems (CPSs) are digital systems that are closely embedded into the physical world with which the...

Some misbehavior detection and reputation systems in mobile ad-hoc networks rely on the dissemination of information of observed behavior, which makes them vulnerable to false accusations. This vulnerability could be removed by forbidding the dissemination of information on observed behavior in the first place, but, as we show here, this has more drawbacks than a solution that allows disseminat...

Recent advances in the fields of Cognitive Radio and the proliferation of open spectrum access promise that spectrum-agile wireless communication will be widespread in the near future, and will bring significant flexibility and potential utility improvements for end users. With spectrum efficiency being a key objective, most relevant research focuses on smart coexistence mechanisms. However, wi...

This study examines environmental and cultural factors related to successful functioning in a stratified random sample of 401 American Indian youths. The success index included seven indicators: good mental health, being alcohol- and drug-free, absence of serious misbehavior, clean police record, good grades, positive psychosocial functioning, and positive behavior and emotions. Family satisfac...

Designing an online resource exchange system is challenging, especially when that system is decentralized and its members fully autonomous. To facilitate the system architecture and protocol design, it is important to understand the behavior of the users and the impact system parameters play on their actions. In this paper we identify key attributes, such as trust and the rate of contribution, ...