[Resource Topic] 2022/1348: ABE for DFA from LWE against Bounded Collusions, Revisited

Welcome to the resource topic for 2022/1348

ABE for DFA from LWE against Bounded Collusions, Revisited

Authors: Hoeteck Wee


We present a new public-key ABE for DFA based on the LWE assumption, achieving security against collusions of a-priori bounded size. Our scheme achieves ciphertext size \tilde{O}(\ell + B) for attributes of length \ell and collusion size B. Prior LWE-based schemes has either larger ciphertext size \tilde{O}(\ell \cdot B), or are limited to the secret-key setting. Along the way, we introduce a new technique for lattice trapdoor sampling, which we believe would be of independent interest. Finally, we present a simple candidate public-key ABE for DFA for the unbounded collusion setting.

ePrint: https://eprint.iacr.org/2022/1348

See all topics related to this paper.

Feel free to post resources that are related to this paper below.

Example resources include: implementations, explanation materials, talks, slides, links to previous discussions on other websites.

For more information, see the rules for Resource Topics .