As structured p2p systems becomes largely deployed, the size of the network becomes large enough that any kind of churn has a significant influence on the performance of such overlay. In structured p2p systems, peers create interactive link with other peers called neighbours that both depend on and influence each other. While peers trust each other’s to delivers services, the network effects ex...

Web 2.0 is the adoption of open technologies and architectural frameworks to facilitate participative computing. Web 2.0 has the potential to deliver rich peer-to-peer interactions among users, enable collaborative value creation across business partners and create dynamic new services and business models. With the emergence of new information technology it is necessary for organizations to red...

Internet-based information technology enables impromptu, virtually anonymous interactions between geographically dispersed, diverse others that is an order of magnitude larger than any preceding information technology. With this increased networking capability comes increased risk and uncertainty. We conducted a content analysis to identify what trustors in peer-to-peer computermediated transac...

We have developed a security model that facilitates control of resources by autonomous peers who act on behalf of collaborating users. This model allows a gradual build-up of trust. It enables secure interactions among users that do not necessarily know each other and allows them to build trust over the course of their collaboration. This paper describes various aspects of our security model an...

Usually, MAS design and implementation involves a coordination model that structures agent interactions and an infrastructure in charge of enacting it. We propose the term Coordination Support to denote the services offered by this infrastructure. Such services can be grouped in different layers. We propose an additional Assistance layer devoted to assist coordination rather than just to enable...

Short message service (SMS) is extremely popular today. Currently, it is being mainly used for peer-to-peer communication. However, SMS could be used as public media platform to enhance social and public interactions in an intuitive way. We have developed BlogWall to extend the SMS to a new level of self-expression and public communication by combining art and poetry. Furthermore, it will provi...

Recent research suggests that peer-to-peer argumentation supports conceptual change in students’ knowledge structures in science and mathematics, provided that students actually juxtapose and evaluate different ideas in a critical, yet coconstructive manner. However, it is well known that this type of peer-to-peer dialogue is not easily elicited and sustained, especially on scientific topics. I...

Peer-to-peer organization of Grid resource discovery services would have several desirable features, including high scalability, high reliability, self-organization and self-healing. In this paper, we describe challenges in applying P2P techniques to Grid services. These include the choice of overlay configuration and varying security requirements for Grid and P2P environments. We present the d...

recently, peer-to-peer (p2p) networks contribute to a large fraction of the internet backbone traffic. consequently, misusing such networks for malicious purposes is a potential side effect. in this review article, we investigate different techniques of misusing p2p overlay networks to launch large-scale next-generation distributed denial of service (ddos) attacks. in particular, we investigate...