Trust-Based Formal Delegation Framework for Enterprise Social Networks

International audienceCollaborative environments raise major challenges to secure them. These challenges increase when it comes to the domain of Enterprise-Social-Networks (ESNs) as ESNs aim to incorporate the social technologies in an organization setup while asserting greater control of information security. In this context, the security challenges have taken a new shape as an ESN may not be limited to the boundaries of a single organization and users from different organizations can collaborate in a common federated environment. In this paper, we address the problem of the authorization's delegation in federated collaborative environments like ESNs. In contrast to traditional XML based languages, such as XACML, our approach is based on event-calculus, a temporal logic programming formalism. Further, the traditional approaches are either user-centric or organization-centric. However, the domain of ESN requires to bridge the gap between them and the proposed framework deals with this challenge. In order to enhance the delegation scheme, we have proposed a behavior monitoring mechanism, that permits to assess principals' trust level within the federated collaborative environment. We evaluate our trust computing approach based on simulated principals' behaviors and discuss the obtained results

Privacy in an Ambient World

Privacy is a prime concern in today's information society. To protect\ud the privacy of individuals, enterprises must follow certain privacy practices, while\ud collecting or processing personal data. In this chapter we look at the setting where an\ud enterprise collects private data on its website, processes it inside the enterprise and\ud shares it with partner enterprises. In particular, we analyse three different privacy\ud systems that can be used in the different stages of this lifecycle. One of them is the\ud Audit Logic, recently introduced, which can be used to keep data private when it\ud travels across enterprise boundaries. We conclude with an analysis of the features\ud and shortcomings of these systems

Utilising Provenance to Enhance Social Computation

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Entrepreneurial capital, social values and Islamic traditions: exploring the growth of women-owned enterprises in Pakistan

Main ArticleThis study seeks to explore the variables contributing to the growth of women-owned enterprises in the Islamic Republic of Pakistan. Based on a previously established multivariate model, it uses two econometric approaches: first classifying variables into predetermined blocks; and second, using the general to specific approach. Statistical analyses and in-depth interviews confirm that women entrepreneurs’ personal resources and social capital have a significant role in their business growth. Further, it reveals that the moral support of immediate family, independent mobility and being allowed to meet with men play a decisive role in the sales and employment growth of women-owned enterprises in an Islamic country such as Pakistan

Does innovation matter for economic development? An empirical study of small and medium-sized enterprises in the city of Kumba – Cameroon

In recent years, the development priorities of African countries have focused on private sector development to build a strong market economy that gives a more dynamic role to indigenous entrepreneurs and their innovative small and medium-sized enterprises (SMEs). This paper investigates the potential for indigenous SMEs in Cameroon to successfully emerge as agents of economic development through innovation. The analysis includes the personal characteristics that make up an indigenous entrepreneur as well as the contemporary environments in which SMEs operate. Building on Schumpeter’s notion that entrepreneurship contributes to economic development through the interplay of new firm creation, innovation and competition, questionnaires and interviews were conducted with indigenous entrepreneurs of selected SMEs in the city of Kumba, one of the most important concentrations of economic activity in the English-Speaking region of Cameroon. The results reveal that while economic profit is a priority for most entrepreneurs, SMEs exists mainly to alleviate poverty through income generating activities and contribute to economic development by providing employment and income for the poor. The SMEs studied focused on adapting, imitating and modifying existing innovations rather than pursuing genuine Schumpeterian innovation. This suggests that innovation is not a priority for the SME sector and therefore policies aimed at catching up with modern technology should be the central focus in providing assistance for indigenous entrepreneurs and these are suggested in this paper

Integration via Meaning: Using the Semantic Web to deliver Web Services

Presented at the CRIS2002 Conference in Kassel.-- 9 pages.-- Contains: Conference paper (PDF) + PPT presentation.The major developments of the World Wide Web (WWW) in the last two years have been Web Services and the Semantic Web. The former allows the construction of distributed systems across the WWW by providing a lightweight middleware architecture. The latter provides an infrastructure for accessing resources on the WWW via their relationships with respect to conceptual descriptions. In this paper, I shall review the progress undertaken in each of these two areas. Further, I shall argue that in order for the aims of both the Semantic Web and the Web Services activities to be successful, then the Web Service architecture needs to be augmented by concepts and tools of the Semantic Web. This infrastructure will allow resource discovery, brokering and access to be enabled in a standardised, integrated and interoperable manner. Finally, I survey the CLRC Information Technology R&D programme to show how it is contributing to the development of this future infrastructure

Devolved governance systems

This article assesses the extent, nature and outcomes of the recently devolved health service governance in the four countries which comprise the United Kingdom. This four-part configuration can be seen as a natural experiment in comparative governance which could therefore carry important lessons not only for the UK but in other countries too. While remaining under the aegis of the National Health Service, each constituent devolved administration has a developed a substantially different governance system. These systems reflect fundamental issues and priorities concerning the decentring of authority, the production and deployment of authority, the suite of incentives required and the preferred role of quasi-market mechanisms. The paper makes an evaluation of the strengths and weaknesses of each governance regime