Anonymity networks are becoming increasingly popular in today's online world as more
users attempt to safeguard their online privacy. Tor is currently the most popular anonymity …

Decentralized systems are a subset of distributed systems where multiple authorities control
different components and no authority is fully trusted by all. This implies that any component …

To date, there has yet to be a study that characterizes the usage of a real deployed
anonymity service. We present observations and analysis obtained by participating in the …

Cryptology is the practice of hiding digital information by means of various obfuscatory and
steganographic techniques. The application of said techniques facilitates message …

Several credential systems have been proposed in which users can authenticate to services
anonymously. Since anonymity can give users the license to misbehave, some variants …

Anonymous credentials are a powerful tool for making assertions about identity while
maintaining privacy and have been the subject of study for many years. The interest in …

We present a reputation scheme for a pseudonymous peer-to-peer (P2P) system in an
anonymous network. Misbehavior is one of the biggest problems in pseudonymous P2P …

We study the security challenges that arise in opportunistic people-centric sensing, a new
sensing paradigm leveraging humans as part of the sensing infrastructure. Most prior sensor …

Anonymizing networks such as Tor allow users to access Internet services privately by using
a series of routers to hide the client's IP address from the server. The success of such …

We propose the first verifier-local revocation scheme for privacy-enhancing attribute-based
credentials (PABCs) that is practically usable in large-scale applications, such as national …