Digital signature is a fundamental primitive with numerous applications. Following the
development of pairing-based cryptography, several taking advantage of this setting have …

We construct the first public-key encryption (PKE) scheme whose chosen-ciphertext (ie, IND-
CCA) security can be proved under a standard assumption and does not degrade in either …

Abstract Structure-preserving signatures (SPS) are a powerful building block for
cryptographic protocols. We introduce SPS on equivalence classes (SPS-EQ), which allow …

It takes time for theoretical advances to get used in practical schemes. Anonymous
credential schemes are no exception. For instance, existing schemes suited for real-world …

Digital signature schemes (DSS) are ubiquitously used for public authentication in the
infrastructure of the internet, in addition to their use as a cryptographic tool to construct even …

Group signatures are a central cryptographic primitive where users can anonymously and
accountably sign messages in the name of a group they belong to. Several efficient …

Abstract Structure-preserving signatures (SPS) are signature schemes where messages,
signatures and public keys all consist of elements of a group over which a bilinear map is …

Group signatures are a central cryptographic primitive, simultaneously supporting
accountability and anonymity. They allow users to anonymously sign messages on behalf of …

This paper presents efficient structure-preserving signature schemes based on simple
assumptions such as decisional linear. We first give two general frameworks for constructing …

Round-optimal blind signatures are notoriously hard to construct in the standard model,
especially in the malicious-signer model, where blindness must hold under adversarially …