Generic groups are an important tool for analyzing the feasibility and in-feasibility of group-
based cryptosystems. There are two distinct wide-spread versions of generic groups …

We present a new, simple candidate broadcast encryption scheme for N users with
parameter size poly (log N). We prove security of our scheme under a non-standard variant …

Abstract Attribute Based Encryption (ABE) can be employed to enforce fine grained access
control over encrypted data. Due to expressiveness, ABE schemes are currently employed …

We construct the first decentralized multi-authority attribute-based encryption (MA-ABE)
scheme for a non-trivial class of access policies whose security is based (in the random …

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 …

Motivated by several new and natural applications, we initiate the study of multi-input
predicate encryption (miPE) and further develop multi-input attribute based encryption …

We give the first construction of non-interactive zero-knowledge (NIZK) arguments from post-
quantum assumptions other than Learning with Errors. In particular, we achieve NIZK under …

We present new lattice-based attribute-based encryption (ABE) and laconic function
evaluation (LFE) schemes for circuits with sublinear ciphertext overhead. For depth d circuits …

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 …

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 …