Continuous-variable quantum authentication of physical unclonable keys

We propose a scheme for authentication of physical keys that are materialized by optical multiple-scattering media. The authentication relies on the optical response of the key when probed by randomly selected coherent states of light, and the use of standard wavefront-shaping techniques that direct the scattered photons coherently to a specific target mode at the output. The quadratures of the electromagnetic field of the scattered light at the target mode are analysed using a homodyne detection scheme, and the acceptance or rejection of the key is decided upon the outcomes of the measurements. The proposed scheme can be implemented with current technology and offers collision resistance and robustness against key cloning.Comment: 15 pages, 7 figure

Revealing the unseen: how to expose cloud usage while protecting user privacy

Cloud users have little visibility into the performance characteristics and utilization of the physical machines underpinning the virtualized cloud resources they use. This uncertainty forces users and researchers to reverse engineer the inner workings of cloud systems in order to understand and optimize the conditions their applications operate. At Massachusetts Open Cloud (MOC), as a public cloud operator, we'd like to expose the utilization of our physical infrastructure to stop this wasteful effort. Mindful that such exposure can be used maliciously for gaining insight into other user's workloads, in this position paper we argue for the need for an approach that balances openness of the cloud overall with privacy for each tenant inside of it. We believe that this approach can be instantiated via a novel combination of several security and privacy technologies. We discuss the potential benefits, implications of transparency for cloud systems and users, and technical challenges/possibilities.Accepted manuscrip

Form or Function? The Impact of New Football Stadia on Property Prices in London

This paper focuses on the channels through which stadium externalities capitalize into property prices. We investigate two of the largest stadium investment projects of the recent decade – the This paper focuses on the channels through which stadium externalities capitalize into property prices. We investigate two of the largest stadium investment projects of the recent decade – the New Wembley and the Emirates stadium in London, UK. Evidence suggests positive stadium externalities, which are large compared to construction costs. Notable anticipation effects are found immediately following the announcement of the final stadium plans. Our results emphasize the role stadium architecture plays in promoting positive spillovers to the neighbourhood. We therefore recommend public funding of large-scale sports facilities to be made conditional on a comprehensive urban design strategy that maximizes the external benefits.Property prices Stadium impact