A HIERARCHICAL TRUSTED THIRD-PARTY SYSTEM FOR SECURE PEER-TOPEER TRANSACTIONS by Khoi Vu Nguyen A peer-to-peer (P2P) network is a distributed network of peer computers loosely connected through the Internet. Transactions in a P2P network are often conducted on a no-security basis. Moreover, peer anonymity is often highly desirable, which makes security even more difficult to achieve. In most ca...

In a peer-to-peer file-sharing system, a client desiring a particular file must choose a source from which to download. The problem of selecting a good data source is difficult because some peers may not be encountered more than once, and many peers are on low-bandwidth connections. Despite these facts, information obtained about peers just prior to the download can help guide peer selection. A...

We propose a mechanism for providing the incentives for reporting truthful feedback in a peer-to-peer system for exchanging services (or content). This mechanism is to complement reputation mechanisms that employ ratings’ feedback on the various transactions in order to provide incentives to peers for offering better services to others. Under our approach, each of the transacting peers (rather ...

In this paper, we analyze patterns of transaction between individuals using data drawn from Kiva.org, a global online crowdfunding platform that facilitates prosocial, peer-to-peer lending. Our analysis, which employs an aggregate dataset of country-to-country lending volumes based on more than three million individual lending transactions that took place between 2005 and 2010, considers the du...

A dynamic student-teacher interaction during class is an important part of the learning experience. However, in regular class settings and especially in large classrooms, it is a challenging task to encourage students to participate as they tend to be intimidated by the size of the audience. In this paper, in order to overcome this issue, we present SpeakUp, a novel context-aware mobile applica...

This study examined the individual functioning, interpersonal relations, and academic performance of 115 male juveniles who were divided into 5 demographically matched groups (sexual offenders with peer/adult victims, sexual offenders with child victims, violent nonsexual offenders, nonviolent nonsexual offenders, and nondelinquent youths). Parents and youths completed self-report instruments, ...

background: the purpose of this study was to compare the occlusal peer assessment rating (par) index in class i patients treated by means of begg and edgewise methods. materials and methods: the pre- and post-treatment study models of class i patients, referred to two private clinics, treated with begg method (n = 30) and standard edgewise method (n = 30), were reviewed retrospectively using pa...