Xen, an x86 virtual machine monitor which allows multiple commodity operating systems to share conventional hardware in a safe and resource managed fashion, but without sacrificing either performance or functionality, considerably outperform competing commercial and freely available solutions.
A framework for providing incentives for honest participation in global-scale distributed trust management infrastructures is introduced and an honesty metric is developed which can indicate the accuracy of feedback.
This paper proposes an extension to the security architecture of the java virtual machine for mobile systems, to support fine-grained policy specification and run-time enforcement, with excellent performance provided by the extended architecture.
XenoTrust is described, the trust management architecture used in the XenoServer Open Platform, and it is suggested that using an event-based publish /subscribe methodology for the storage, retrieval and aggregation of reputation information can help exploiting asynchrony and simplicity, as well as improving scalability.
The various design parameters for audio location systems, the applicability of audio location for novel 3D user interfaces based on human sounds, and a quantitative evaluation of a working prototype are described.
This paper presents the initial work on a novel paradigm for information security and privacy protection in the ubiquitous world through sets of contextual attributes and mitigate the projected risks through proactive and reactive data format transformations, subsetting and forced migrations while trying to maximize information availability.
This work presents an approach to modeling the world based on natural notions of container and containment and shows how it enables explicit reasoning about and acting upon context-implied effects on target entities, data objects in particular.
This thesis would have never arrived at this point in the PhD path without generous financial support from St John's College Benefactors' Scholarship, Overseas Research Scholarship, Cambridge Overseas Trust and Cambridge Philosophical Society.
XenoTrust provides a flexible platform over which many of the interesting distributed trust management algorithms presented in the literature can be evaluated in a large-scale wide-area setting.
The EMV payment protocol is extended to provide explicit verification and confirmation of the transaction amount, and cardholder authentication is improved, to protect against stolen PIN and cards, and eliminate the POS terminal from the trust chain altogether.