A formal model of trust lifecycle management

The rapid development of collaborative environments over the internet has highlighted new concerns over security and trust in such global computing systems. The global computing infrastructure poses an issue of uncertainty about the potential collaborators. Reaching a trusting decision in such environments encompasses both risk and trust assessments. While much work has been done in terms of modelling trust, the investigation of the management of trust lifecycle issues with consideration of both trust and risk is less examined. Our previous work addressed the dynamic aspects of trust lifecycle with a consideration of trust formation, exploitation, and evolution. In this paper we provide an approach for formalizing these aspects. As part of the formalization of the trust lifecycle,we introduce a notion of attraction to model the effect of new pieces of evidence on our opinion. The formalization described in this paper constitutes the basis of ongoing work to investigate the properties of the model

Trust dynamics for collaborative global computing

Recent advances in networking technology have increased the potential for dynamic enterprise collaborations between an open set of entities on a global scale. The security of these collaborations is a major concern, and requires novel approaches suited to this new environment to be developed. Trust management appears to be a promising approach. Due to the dynamic nature of these collaborations,dynamism in the formation, evolution and exploitation of trust is essential. In this paper we explore the properties of trust dynamics in this context. Trust is formed and evolves according to personal experience and recommendations. The properties of trust dynamics are expressed through a formal model of trust. Specific examples, based on an e-purse application scenario are used to demonstrate these properties

Trust management

This book constitutes the refereed proceedings of the First International Conference on Trust Management, iTrust 2003, held in Heraklion, Crete, Greece in May 2003. The 24 revised full papers presented were carefully reviewed and selected from 58 submissions. This first book devoted to the emerging interdisciplinary field of trust management spans the whole range of relevant topics, from technical issues in distributed and open systems to legal, social, and philosophical aspects

Using trust for secure collaboration in uncertain environments

The SECURE project is investigating the design of security mechanisms for pervasive computing based on the human notion of trust. Our work addresses how entities that encounter each other in unfamiliar pervasive computing environments can overcome initial suspicion to allow secure collaboration to take place