Membership revocation is essential for cryptographic applications, from traditional PKIs to
group signatures and anonymous credentials. Of the various solutions for the revocation …

Cryptographic accumulators are a tool for compact set representation and secure set
membership proofs. When an element is added to a set by means of an accumulator, a …

Authentication mechanisms play an important role in everyday digital interactions and allow
users to prove their identity to others. Privacy-preserving Attribute-Based Credential Systems …

This thesis presents advances in several areas of authentication. First, we consider
cryptographic accumulators, which are compact digital objects representing arbitrarily large …