A framework for P2P application development

Although Peer-to-Peer (P2P) computing has become increasingly popular over recent years, there still exist only a very small number of application domains that have exploited it on a large scale. This can be attributed to a number of reasons including the rapid evolution of P2P technologies, coupled with their often-complex nature. This paper describes an implemented abstraction framework that seeks to aid developers in building P2P applications. A selection of example P2P applications that have been developed using this framework are also presented

Asynchronous instant messaging using service-oriented architectures (aimsoa), 2005

Instant messengers suffer from poor scalability, flexibility, security, and interoperability. This study attempts to solve these problems using the strengths of Service-Oriented Architectures. The key components to achieve these improvements include several Java related technologies such as JAX-RPC, JAXM, SOAP, WSDL, J2EE servlets and Enterprise Java Beans. SOAP provides a universal messaging protocol that heterogeneous parties can understand. JAX-RPC provides synchronous SOAP messaging, as well as a loosely coupled design that allows for a very flexible distributed architecture. JAXM provides asynchronous SOAP messaging. When used together, applications can implement robust instant messaging functionality. Registration, login, and other instant messaging configuration operations can be fulfilled through the use of JAX-RPC while JAXM can be used to fulfill requirements such as send and receive. Servlets and Enterprise Java Beans augment the benefits of Service-Oriented Architectures with the former being extremely scalable, portable, and modular. AIMSOA encapsulates these components to provide an instant messaging architecture solution that will augment the weaknesses of current instant messaging architectures by providing a solution for better scalability, flexibility, and interoperability

Mobile University Notification System Using Jabber Protocol

This progress report consists of sections, Introduction, Literature Review, Methodology, Results & Discussion and Conclusion. For the Introduction section includes the project's background, problem statement, objectives and scope of work. In the Literature Review section consist of results from literature gathering from various sources like articles, journals or the Internet. The section is divided to Introduction, Problem Statement, Current Implementation/Related Works and Support. For the Methodology section consist of the project's proposed methodology or how the project will be conducted. The project is using the Waterfall Methodology. For the Results & Discussion section consist of the previous activities conducted for the project and their end results. Finally the Conclusion section will include the final conclusion for this interim

Learning from Digital Natives: Bridging Formal and Informal Learning. Final Report

Overview This report suggests that students are increasingly making use of a variety of etools (such as mobile phones, email, MSN, digital cameras, games consoles and social networking sites) to support their informal learning within formalised educational settings, and that they use the tools that they have available if none are provided for them. Therefore, higher education institutions should encourage the use of these tools. Aims and background This study aimed to explore how e-tools (such as mobile phones, email, MSN, digital cameras, games consoles and social networking sites) and the processes that underpin their use can support learning within educational institutions and help improve the quality of students’ experiences of learning in higher education (pgs 9-11). Methodology The study entailed: (i) desk research to identify related international research and practice and examples of integration of e-tools and learning processes in formal educational settings; (ii) a survey of 160 engineering and social work students across two contrasting Scottish universities (pre- and post-1992) – the University of Strathclyde and Glasgow Caledonian University – and follow-up interviews with eight students across the two subject areas to explore which technologies students were using for both learning and leisure activities within and outside the formal educational settings and how they would like to use such technologies to support their learning in both formal and informal settings; and (iii) interviews with eight members of staff from across the institutions and two subject areas to identify their perceptions of the educational value of the e-tools. (pgs 24-27). Key findings • Students reported making extensive use of a variety of both e-tools (such as mobile phones, email, MSN, digital cameras) and social networking tools (such as Bebo, MySpace, Wikipedia and YouTube) for informal socialisation, communication, information gathering, content creation and sharing, alongside using the institutionally provided technologies and learning environments. • Most of the students owned their own computer or had access to a sibling or parent’s computer. Many students owned a laptop but preferred not to bring it onto campus due to security concerns and because they found it too heavy to carry about. • Ownership of mobile phones was ubiquitous. • Whilst the students’ information searching literacy seemed adequate, the ability of these students to harness the power of social networking tools and informal processes for their learning was low. Staff reported using a few Web 2.0 and social software tools but they were generally less familiar with how these could be used to support learning and teaching. There were misconceptions surrounding the affordances of the tools and fears expressed about security and invasion of personal space. Considerations of the costs and the time it would take staff to develop their skills meant that there was a reluctance to take up new technologies at an institutional level. • Subject differences emerged in both staff and student perceptions as to which type of tools they would find most useful. Attitudes to Web 2.0 tools were different. Engineers were concerned with reliability, using institutional systems and inter-operability. Social workers were more flexible because they were focused on communication and professional needs. • The study concluded that digital tools, personal devices, social networking software and many of the other tools explored all have a large educational potential to support learning processing and teaching practices. Therefore, use of these tools and processes within institutions, amongst staff and students should be encouraged. • The report goes on to suggest ways in which the use of such technologies can help strengthen the links between informal and formal learning in higher education. The recommendations are grouped under four areas – pedagogical, socio-cultural, organisational and technological

Auto-Translation Instant Messenger using XMPP/Jabber Protocol

Effective communication is a vital component in decision making process. However, the language barrier established from the differences in culture and origin can interrupt the process of coming to an understanding. Various translation methods have been used to break this barrier. The traditional ways of using human translator or the usage of lingua franca imposed some problem and limitations. Auto-Translation Instant Messenger is an 1M program that aimed to provide instant translation to users when they communicate with people of different speaking language. It is developed under the XMPP protocol that provides standards and flexibilities at the same time. In the process of completing this project, Modified Waterfall methodology was chosen as guidance in the development of the working program. Important project activities and milestones are explained. As part of analysis process, a set of questionnaire have been distributed and its result will act as guidance in designing and developing the program. This project is aimed to learn in deep about XMPP, machine translation and instant messagin

ONEChat: Enabling Group Chat and Messaging in Opportunistic Networks

Opportunistic networks, which are wireless network "islands" formed when transient and highly mobile nodes meet for a short period of time, are becoming commonplace as wireless devices become more and more popular. It is thus imperative to develop communication tools and applications that work well in opportunistic networks. In particular, group chat and instant messaging applications are particularly lacking for such opportunistic networks today. In this paper, we present ONEChat, a group chat and instant messaging program that works in such opportunistic networks. ONEChat uses message multicasting on top of service discovery protocols in order to support group chat and reduce bandwidth consumption in opportunistic networks. ONEChat does not require any pre-configuration, a fixed network infrastructure or a client-server architecture in order to operate. In addition, it supports features such as group chat, private rooms, line-by-line or character-by-character messaging, file transfer, etc. We also present our quantitative analysis of ONEChat, which we believe indicates that the ONEChat architecture is an efficient group collaboration platform for opportunistic networks

Towards secure message systems

Message systems, which transfer information from sender to recipient via communication networks, are indispensable to our modern society. The enormous user base of message systems and their critical role in information delivery make it the top priority to secure message systems. This dissertation focuses on securing the two most representative and dominant messages systems---e-mail and instant messaging (IM)---from two complementary aspects: defending against unwanted messages and ensuring reliable delivery of wanted messages.;To curtail unwanted messages and protect e-mail and instant messaging users, this dissertation proposes two mechanisms DBSpam and HoneyIM, which can effectively thwart e-mail spam laundering and foil malicious instant message spreading, respectively. DBSpam exploits the distinct characteristics of connection correlation and packet symmetry embedded in the behavior of spam laundering and utilizes a simple statistical method, Sequential Probability Ratio Test, to detect and break spam laundering activities inside a customer network in a timely manner. The experimental results demonstrate that DBSpam is effective in quickly and accurately capturing and suppressing e-mail spam laundering activities and is capable of coping with high speed network traffic. HoneyIM leverages the inherent characteristic of spreading of IM malware and applies the honey-pot technology to the detection of malicious instant messages. More specifically, HoneyIM uses decoy accounts in normal users\u27 contact lists as honey-pots to capture malicious messages sent by IM malware and suppresses the spread of malicious instant messages by performing network-wide blocking. The efficacy of HoneyIM has been validated through both simulations and real experiments.;To improve e-mail reliability, that is, prevent losses of wanted e-mail, this dissertation proposes a collaboration-based autonomous e-mail reputation system called CARE. CARE introduces inter-domain collaboration without central authority or third party and enables each e-mail service provider to independently build its reputation database, including frequently contacted and unacquainted sending domains, based on the local e-mail history and the information exchanged with other collaborating domains. The effectiveness of CARE on improving e-mail reliability has been validated through a number of experiments, including a comparison of two large e-mail log traces from two universities, a real experiment of DNS snooping on more than 36,000 domains, and extensive simulation experiments in a large-scale environment