Laconic cryptography is an emerging paradigm that enables cryptographic primitives with
sublinear communication complexity in just two messages. In particular, a two-message …

We build a concretely efficient threshold encryption scheme where the joint public key of a
set of parties is computed as a deterministic function of their locally computed public keys …

Abstract Registration-Based Encryption (RBE)[Garg et al. TCC'18] is a public-key encryption
mechanism in which users generate their own public and secret keys, and register their …

Traitor-tracing systems allow identifying the users who contributed to building a rogue
decoder in a broadcast environment. In a traditional traitor-tracing system, a key authority is …

Registered encryption (Garg et al., TCC'18) is an emerging paradigm that tackles the key-
escrow problem associated with identity-based encryption by replacing the private-key …

Attribute-based encryption (ABE) is a generalization of public-key encryption that enables
fine-grained access control to encrypted data. In (ciphertext-policy) ABE, a central trusted …

This paper presents the first generic black-box construction of registered attribute-based
encryption (Reg-ABE) via predicate encoding [TCC'14]. The generic scheme is based on k …

Witness encryption is a generalization of public-key encryption where the public key can be
any NP statement x and the associated decryption key is any witness w for x. While early …

Registered attribute-based encryption (Reg-ABE), introduced by Hohenberger et
al.(Eurocrypt'23), emerges as a pivotal extension of attribute-based encryption (ABE), aimed …

Distributed broadcast encryption (DBE) improves on the traditional notion of broadcast
encryption by eliminating the key-escrow problem: In a DBE system, users generate their …