Traceback of DDoS attacks using entropy variations

Distributed Denial-of-Service (DDoS) attacks are a critical threat to the Internet. However, the memoryless feature of the Internet routing mechanisms makes it extremely hard to trace back to the source of these attacks. As a result, there is no effective and efficient method to deal with this issue so far. In this paper, we propose a novel traceback method for DDoS attacks that is based on entropy variations between normal and DDoS attack traffic, which is fundamentally different from commonly used packet marking techniques. In comparison to the existing DDoS traceback methods, the proposed strategy possesses a number of advantagesit is memory nonintensive, efficiently scalable, robust against packet pollution, and independent of attack traffic patterns. The results of extensive experimental and simulation studies are presented to demonstrate the effectiveness and efficiency of the proposed method. Our experiments show that accurate traceback is possible within 20 seconds (approximately) in a large-scale attack network with thousands of zombies.

Ebia Olewale : a life of service

Over the last seven decades, Papua New Guinea (PNG) has grown from a disparate collection of traditional societies loosely governed by its neighbour, Australia, to a thriving, developing state. The story of how PNG came to lose its colonial shackles and gain independence is one of collective endeavour, as the tiny group of Papua New Guineans who gathered in the dusty streets of Port Moresby transformed into the leaders of the new nation. One of them was the young teacher, Ebia Olewale, who in his own journey from the village to the nation experienced many triumphs and tragedies. PNG’s story – from the village to the world – is retold in this book, through the experiences of Ebia Olewale.

Relationships, the role of individuals and knowledge flows in the internationalization of service firms

This article develops a new conceptual model of knowledge flows within international service firms. Our model takes explicit account of the critical role of relationships and the individual as being central to the process of knowledge transfer for service firms. The model is then validated with data collected from five international service firms using critical event analysis techniques. The findings reinforce our contention that the individual plays a critical role in the process of knowledge transfer and that relationships form an integral part of this process. The implications of this finding are also discussed.

Management of service level agreement for service-oriented content adaptation platform

It is paramount to provide seamless and ubiquitous access to rich contents available online to interested users via a wide range of devices with varied characteristics. Recently, a service-oriented content adaptation scheme has emerged to address this content-device mismatch problem. In this scheme, content adaptation functions are provided as services by third-party providers. Clients pay for the consumed services and thus demand service quality. As such, negotiating for the QoS offers, assuring negotiated QoS levels and accuracy of adapted content version are essential. Any non-compliance should be handled and reported in real time. These issues elevate the management of service level agreement (SLA) as an important problem. This chapter presents prior work, important challenges, and a framework for managing SLA for service-oriented content adaptation platform.

Antecedents and consequences of service quality in a higher education context : A qualitative research approach

Purpose – The purpose of the paper is to report on the perception of students in regard to critical antecedents, dimensions and consequences of service quality with an aim to develop a theoretical model in the context of a university in Australia.

Design/methodology/approach – This research used focus group discussions with 19 students who had been studying in undergraduate and postgraduate level programs at an Australian university.

Findings – The findings show that the critical antecedents to perceived service quality are information and past experience. There are three aspects of perceived service quality, namely, academic, administrative and facilities. Student satisfaction and student trust are found to have direct and positive relationships with perceived service quality as consequences; and brand performance and behavioural intention are found to have indirect relationships with perceived service quality mediated through satisfaction and trust.

Originality/value – This paper found three separate themes and their relationships with service quality in the context of a university. These themes are: information, past experience and brand performance. Perceived service quality was found playing an important role in this theoretical model. The model provides a good explanation of university brand performance and students' behavioural intentions.

Telephone survey of service-user experiences of a telephone-based mental health triage service

The participation of service users in all aspects of mental health service delivery including policy development, service planning and evaluation is increasingly an expectation of contemporary mental health care. Although there are a growing number of publications reporting service-user perspectives in the evaluation of mental health services, little attention has been paid to the views of service users about mental health triage services. The purpose of the study reported here was to examine service-users' (consumers and informal carers) experiences of a telephone-based mental health triage service. Using a framework developed from the World Health Organisation's elements of responsiveness, we conducted structured telephone interviews with service users who had contacted a telephone-based mental health triage service in regional Victoria, Australia. The main findings of the study were that consumers experienced more difficulty than carers in accessing the service and that, although most participants were satisfied, only a minority reported being involved in decision-making. Further work is needed to improve accessibility of mental health triage services and to investigate barriers to consumer self-referral. Professional development and practice support systems should be established to support mental health triage nurses in the development of collaborative, consumer-focused care.

Emerging wireless personal area networks(WPANs) : - An analysis of techniques, tools and threats

Wireless Personal Area Networks provide a pivotal role in local area network technology complementing traditional Wireless Local Area Network technologies. Bluetooth, ZigBee and NFC (Near Field Communications) have emerged as key WPAN technologies with UWB (Ultra Wide Band) standards currently evolving. They are however subject to the usual range of security vulnerabilities found in wireless LANs such as spoofing, snooping, man-in-the-middle, denial of service and other attacks. However security in WPANs is not as mature as it is in Wireless LANs and further work is needed in order to provide comparable protection. This paper examines a range of WPAN technologies and security issues and proposes protection mechanisms that can mitigate risk in each case. © 2012 IEEE.

The house of service: the Gulen movement and Islam's third way

David Tittensor offers a groundbreaking new perspective on the Gülen movement, a Turkish Muslim educational activist network that emerged in the 1960s and has grown into a global empire with an estimated worth of $25 billion. Named after its leader Fethullah Gülen, the movement has established more than 1,000 secular educational institutions in over 140 countries, aiming to provide holistic education that incorporates both spirituality and the secular sciences.

Despite the movement's success, little is known about how its schools are run, or how Islam is operationalized. Drawing on thirteen months of ethnographic fieldwork in Turkey, Tittensor explores the movement's ideo-theology and how it is practiced in the schools. His interviews with both teachers and graduates from Africa, Indonesia, Central Asia, and Turkey show that the movement is a missionary organization, but of a singular kind: its goal is not simply widespread religious conversion, but a quest to recoup those Muslims who have apparently lost their way and to show non-Muslims that Muslims can embrace modernity and integrate into the wider community. Tittensor also examines the movement's operational side and shows how the schools represent an example of Mohammad Yunus's social business model: a business with a social cause at its heart.

The House of Service is an insightful exploration of one of the world's largest transnational Muslim associations, and will be invaluable for those seeking to understand how Islam will be perceived and practiced in the future.

Quality of service-based service level agreement management framework for hydrocarbon exploration and discovery operation

 The major contributions presented in this thesis are twofold. Firstly, it presents the research towards a unique services-based Hydrocarbon Exploration and Discovery Model that demonstrates the feasibility of using advanced ICT technologies in the reproduction of stages involved in an oil and gas discovery, processing and analysis process. Secondly, the research demonstrated a solution of the problems in providing agreed level of quality of service (QoS) and formalizing of appropriate Service Level Agreements (SLA) within such complex environment where different services within the model can be delivered by a variety of service providers