The Cost of Trust in the Dynamics of Best Attachment

The need of trust is growing in several contexts as e-commerce, virtual communities, distributed on-line services and many others as an essential precautionary component for users during interactions with strangers, either other people or virtual agents. Generally trust metrics endorse the principle "the higher the trust, the more legitimate that user will be''; a consequence is that getting trusted must require some effort, otherwise all participants would easily achieve high trustworthiness. In this work we study how a user can achieve and preserve a good trust and what costs it requires over time; we also investigate some heuristics that allow reducing the complexity in exploring the rank-effort space especially for large networks

Anonymous client authentication for transport layer security

Abstract. Nowadays, anonymity and privacy protecting mechanisms are becoming more and more important. The anonymity of platforms and the privacy of users operating in the Internet are major concerns of current research activities. Although different techniques for protecting anonymity exist, standard protocols like Transport Layer Security are still missing adequate support for these technologies. In this paper, we analyze how Trusted Computing technologies and anonymous credential systems can be used in order to allow clients to establish anonymous authentication over secure channels. Furthermore, we analyze how these technologies can be integrated into common security frameworks like the Java Cryptography Architecture. We discuss the performance that can be achieved with this approach and analyse which performance can be expected from currently available Trusted Platform Modules