Anonymous attribute-based credentials (ABCs) are a powerful tool allowing users to
authenticate while maintaining privacy. When instantiated from structure-preserving …

Abstract Structure-preserving signatures (SPS) are an important building block for privacy-
preserving cryptographic primitives, such as electronic cash, anonymous credentials, and …

We put forth a new framework for building pairing-based non-interactive zero-knowledge
(NIZK) arguments for a wide class of algebraic languages, which are an extension of linear …

We construct the first hierarchical identity-based encryption (HIBE) scheme with tight
adaptive security in the multi-challenge setting, where adversaries are allowed to ask for …

In structure-preserving cryptography, every building block shares the same bilinear groups.
These groups must be generated for a specific, a priori fixed security level, and thus it is vital …

In this paper, we consider tight multi-user security under adaptive corruptions, where the
adversary can adaptively corrupt some users and obtain their secret keys. We propose …

We propose the first tightly secure and unbounded hierarchical identity-based encryption
(HIBE) scheme based on standard assumptions. Our main technical contribution is a novel …

Abstract Structure-preserving signatures (SPS) have emerged as an important cryptographic
building block, as their compatibility with the Groth-Sahai (GS) NIZK framework allows to …

In this work, we present the first leakage-resilient identity-based encryption (LR-IBE) scheme
that features (almost) tight security under the multi-challenge setting, in which the adversary …

Unique signatures are digital signatures with exactly one unique and valid signature for
each message. The security reduction for most unique signatures has a natural reduction …