7,052 research outputs found

    Systemization of Pluggable Transports for Censorship Resistance

    Full text link
    An increasing number of countries implement Internet censorship at different scales and for a variety of reasons. In particular, the link between the censored client and entry point to the uncensored network is a frequent target of censorship due to the ease with which a nation-state censor can control it. A number of censorship resistance systems have been developed thus far to help circumvent blocking on this link, which we refer to as link circumvention systems (LCs). The variety and profusion of attack vectors available to a censor has led to an arms race, leading to a dramatic speed of evolution of LCs. Despite their inherent complexity and the breadth of work in this area, there is no systematic way to evaluate link circumvention systems and compare them against each other. In this paper, we (i) sketch an attack model to comprehensively explore a censor's capabilities, (ii) present an abstract model of a LC, a system that helps a censored client communicate with a server over the Internet while resisting censorship, (iii) describe an evaluation stack that underscores a layered approach to evaluate LCs, and (iv) systemize and evaluate existing censorship resistance systems that provide link circumvention. We highlight open challenges in the evaluation and development of LCs and discuss possible mitigations.Comment: Content from this paper was published in Proceedings on Privacy Enhancing Technologies (PoPETS), Volume 2016, Issue 4 (July 2016) as "SoK: Making Sense of Censorship Resistance Systems" by Sheharbano Khattak, Tariq Elahi, Laurent Simon, Colleen M. Swanson, Steven J. Murdoch and Ian Goldberg (DOI 10.1515/popets-2016-0028

    Describing Agile Requirements Development and Communication using Complex Adaptive Systems Theory

    Get PDF
    Agile software development methods help software development teams respond to changing requirements. Fundamental to this ability to respond to change is the manner in which requirements are communicated and developed. The question of agile requirements development is considered through the lens of Complex Adaptive Systems theory, a theory used to explain agility in software development teams. A case study of the communication and development of requirements in a software development team is reported, where the three dimensions of CAS Theory described by Vidgen and Colleagues (Vidgen and Wang 2009) are adapted to describe requirements communication and development practices in greater detail. We find that this focus on requirements practices can further explain increases in a software team’s agility

    Software Sustainability: The Modern Tower of Babel

    Get PDF
    <p>The aim of this paper is to explore the emerging definitions of software sustainability from the field of software engineering in order to contribute to the question, what is software sustainability?</p

    Enhancing Set-Based Design To Engineer Resilience For Long-Lived Systems

    Get PDF
    At the heart of Set-Based Design is the concept that down-select decisions are deferred until sufficient information is available to make a decision, i.e., a set of possible solutions is maintained. Due to the extended service lives of many of our current and future systems, the horizon for accurately predicting the system’s requirement is shorter than the service life, so the needed information to down-select to a single optimized solution is unavailable at the time of fielding. Set-Based Design can, however, be extended to explicitly carry a set of possible solutions past the point of the initial fielding of the system by considering changeability, as enabled through designed-in reserve capacity to accommodate additional volume, weight, power, cooling, and computer performance. Proposed is an analytical framework that enhances Set-Based Design to engineer resilient systems with cost-effective post-production growth capability by means of reserve capacity and illustrate it through a case study

    Evolution of Supply Chain Collaboration: Implications for the Role of Knowledge

    Get PDF
    Increasingly, research across many disciplines has recognized the shortcomings of the traditional “integration prescription” for inter-organizational knowledge management. This research conducts several simulation experiments to study the effects of different rates of product change, different demand environments, and different economies of scale on the level of integration between firms at different levels in the supply chain. The underlying paradigm shifts from a static, steady state view to a dynamic, complex adaptive systems and knowledge-based view of supply chain networks. Several research propositions are presented that use the role of knowledge in the supply chain to provide predictive power for how supply chain collaborations or integration should evolve. Suggestions and implications are suggested for managerial and research purposes

    Is Safe Agile Portfolio Management Compatible With COBIT?

    Get PDF
    Background. Software development companies leverage various agile practices to remain flex- ible in dynamically developing markets. The iterative nature of Agile introduces new challenges at the portfolio management level. Yet, the research on Agile portfolio management has enjoyed limited research interest. Aim. Describe how traditional management approaches can leverage existing agile portfolio management practices and concepts. Method. Conceptual Analysis with mapping of SAFe portfolio management concepts and COBIT 2019. Results. Portfolio man- agement concepts from SAFe which the COBIT 2019 practitioners can leverage. Conclusion. Using the frameworks SAFe and COBIT combined is not yet ready for implementation. Rec- ommendation. Introduce new COBIT’s focus area so that the agile concepts can be leveraged

    Forward solutions in digital learning transformation: a study in navigating 21st-century organizational learning for learning & development professionals

    Get PDF
    While there is a substantial volume of information on digital transformation in companies and basic knowledge of the learning functions in organizations, there is little academic research on the skilling required of Learning and Development Practitioners or Professionals (LDPs) and the impact 21st century digital transformation has on their role. This mixed methods study shares lived experiences and the perceptions of LDPs and identifies challenges with which they are faced. Overall, the study explores transformation of LDPs within the construct of organizations and the digital evolution. The study reviews how LDPs are adapting to the rapid changes and the evolution of their learning environments, their input on the support they receive, and how adapting their skills and capabilities are crucial for future success. Furthermore, it identifies the changes that impact the Learning and Development function (L&D) and the effects on LDPs\u27 roles, redefining and reimagining the purpose of organizational learning as it makes up the new ecosystem of learning driven by technology. It aimed to provide insights and answer questions on how LDPs are being supported by their leaders, are leaders removing roadblocks or adding new ones. The study used data, insights, and input from 56 learning practitioners currently impacted by agile organizational practices and the evolution of their role. Guiding the study were several key research questions which focused on the culture and support of learning by LDPs. Do LDPs feel they have opportunities to cultivate new skills and capabilities for the 21st century, and how have the adapted their practices to embrace digital learning. This study revealed 4 key conclusions related to creating a culture of learning for LDPs and providing an ecosystem which will contribute to their success and the broader community of practice. The study concluded with recommendations for future research and obtaining additional input of learning practitioners via interviews to seek out viewpoints which were not easily captured in surveys. Although additional points of view were welcomed, further recommendations identified excluding higher education practitioners to drive to more corporate organization results
    • …
    corecore