The use of privacy-enhancing cryptographic protocols, such as anonymous credentials and oblivious transfer, often has a detrimental effect on the ability of providers to effectively implement access controls on their content. In this paper, we propose a stateful anonymous credential system

several potentially rich avenues of future work. 1 Introduction In 2003, three separate credential systems were introduced which have very similar capabilities. Most notably, they allow credential contents to be used directly in access control processes, leading to systems in which credentials can be used

in their clout, investment opportunity sets, access to information, etc. In this study, we ask whether these differences help explain the cross-section of VC investment performance. We focus on the co-investment networks that VC syndication gives rise to, and leave the other two main networks VCs use (involving

, profiling, etc.). A basic principle of data privacy is purpose specification which states that data providers should be able to specify the purpose for which their data will be collected and used. In the context of P2P systems, decentralized control makes it hard to enforce purpose-based privacy

flux – and suggest some potential lines of research that could be explored using these data. The SRDB database is available online in a perma-nent archive as well as via a project-hosting repository; the latter source leverages open-source software technologies to encourage wider participation

This paper presents a new disk I/O architecture composed of an array of a flash memory SSD (solid state disk) and a hard disk drive (HDD) that are intelligently coupled by a special algorithm. We call this architecture I-CASH: Intelligently Coupled Array of SSD and HDD. The SSD stores seldom

I would like to thank some people who were involved in the creation of this thesis: • Berry Schoenmakers of TU Eindhoven for introducing me to the topic of cryptographic voting protocols. • Evangelos Karatsiolis for his work in guiding me through the process of writing this thesis and his constant motivation. • Roberto Samarone Araujo for hours of discussing various protocols with Evengelos and me. • Warren D. Smith for providing with a preliminary version of his upcoming book »How Mathematics can Improve Democracy«. • Ute Günther and Christian Burgmann for their proof-reading. Nonetheless, any remaing errors shall be blamed on me. • Andrea Peter for her love and for cheering me up when I was down. • Last but not least my parents, Jacqueline Herrnkind and Hans Peter Klink – without their love and continuous support, this thesis would never have been written.

to meaningful events in a timely manner. Smart supply chains fusing dynamic sensor data with information provided by backend-systems are one such example of event-based enterprise systems. Monitoring their global state in an effective way for runtime governance remains an open research challenge: providing

pages 156–175, 2013. [2] Johannes Buchmann, Denise Demirel, and Jeroen van de Graaf. Towards a publicly-verifiable mix-net providing everlasting privacy. In Financial Cryptog-raphy, pages 197–204, 2013. [3] Denise Demirel, Jeroen van de Graaf, and Roberto Araùjo. Improving helios

Hiermit versichere ich, die vorliegende Master-Thesis ohne Hilfe Dritter nur mit den an-gegebenen Quellen und Hilfsmitteln angefertigt zu haben. Alle Stellen, die aus Quellen entnommen wurden, sind als solche kenntlich gemacht. Diese Arbeit hat in gleicher oder ähnlicher Form noch keiner Prüfungsbehörde vorgelegen. Darmstadt, den 28th February 2014 (Denis Lapiner) This Master’s Thesis proposes and implements a game design for an Android based massively multiplayer online augmented reality game. The proposed game design is based on an analysis of other popular aug-mented reality games such as Ingress, a game created by Google Inc. The game of this thesis motivates the players to meet in the real world and move in groups to certain points of interest like historic mon-uments. The spatial locality of players, which comes up when players move in groups, makes the game interesting for the research on mobile ad hoc networks (MANETs). The provided implementation of the game contains a centralized communication component that logs the network communication between players and therefore, is usable for data collection of network traffic in MANETs. The collected data