The growth of content delivery networks (CDNs) has engendered centralized control over
the serving of internet content. An unwanted by-product of this growth is that CDNs are fast …

Zero-knowledge arguments have become practical, and widely used, especially in the world
of Blockchain, for example in Zcash. This work revisits zero-knowledge proofs in the discrete …

Abstract Bootle et al.(EUROCRYPT 2016) construct an extremely efficient zero-knowledge
argument for arithmetic circuit satisfiability in the discrete logarithm setting. However, the …

Anonymous single-use tokens have seen recent applications in private Internet browsing
and anonymous statistics collection. We develop new schemes in order to include public …

We propose a new, communication-efficient way for users to fetch multiple blocks
simultaneously in Goldberg's robust information-theoretic private information retrieval (IT …

Sender-anonymous end-to-end encrypted messaging allows sending messages to a
recipient without revealing the sender's identity to the messaging platform. Signal recently …

We present BLACRONYM, a suite of new communication-and computation-efficient
protocols for anonymous blacklisting without trusted third parties. Our protocols improve on …

E-voting is an important application of secure MPC (multi-party computation) and its
achievement of security through verifiable MPC can be based on homomorphic encryption …

One of the difficulties in effectively analysing and combating cyber attacks is an inability to
identify when, why and how they occur. Victim organisations do not reveal this data for fear …

Secure two-party computation cannot be fair against malicious adversaries, unless a trusted
third party (TTP) or a gradual-release type super-constant round protocol is employed …