June 18, 2021

SpywareNews.com

Dedicated Forum to help removing adware, malware, spyware, ransomware, trojans, viruses and more!

Dynamic Universal Accumulator with Batch Update over Bilinear Groups, by Giuseppe Vitto and Alex Biryukov

We propose a Dynamic Universal Accumulator in the Accumulator Manager setting for bilinear groups which extends Nguyen’s positive accumulator and Au et al. and Damg√•rd and Triandopoulos non-membership proof mechanism. The new features include support for batch addition and deletion operations as well as a privacy-friendly decentralized batch witness update protocol, where the witness update information is the same for all users. Together with a non-interactive zero-knowledge protocol, these make the proposed scheme suitable as an efficient and scalable Anonymous Credential System, accessible even by low-resource users.
We show security of the proposed protocol in the Generic Group Model under a (new) generalized version of the t-SDH assumption and we demonstrate its practical relevance by providing and discussing an implementation realized using state-of-the-art libraries.