Attribute-Based Encryption for Circuits from Multilinear Maps

TL;DR

This paper introduces the first Attribute-Based Encryption scheme for general circuits using multilinear maps, providing secure and flexible encryption methods for complex access policies.

Contribution

It presents the first construction of ABE for general circuits based on multilinear maps, with security proof in the standard model.

Findings

Secure ABE scheme for general circuits constructed

Scheme supports both Key-Policy and Ciphertext-Policy variants

Security based on multilinear generalization of BDDH assumption

Abstract

In this work, we provide the first construction of Attribute-Based Encryption (ABE) for general circuits. Our construction is based on the existence of multilinear maps. We prove selective security of our scheme in the standard model under the natural multilinear generalization of the BDDH assumption. Our scheme achieves both Key-Policy and Ciphertext-Policy variants of ABE.