Verifiable Data Sharing Scheme for Dynamic Multi-Owner Setting

TL;DR

This paper introduces VDS-DM, a verifiable data-sharing scheme that enables secure, efficient, and trustless file sharing among dynamically changing multiple owners without third-party reliance.

Contribution

The scheme supports dynamic multi-owner data sharing using linear secret-sharing, multi-owner signatures, and aggregation, reducing overhead and eliminating the need for trusted third parties.

Findings

Supports dynamic owner changes with signature updates

Ensures file integrity verification without third-party assistance

Demonstrates feasibility through simulation experiments

Abstract

One of scenarios in data-sharing applications is that files are managed by multiple owners, and the list of file owners may change dynamically. However, most existing solutions to this problem rely on trusted third parties and have complicated signature permission processes, resulting in additional overhead. Therefore, we propose a verifiable data-sharing scheme (VDS-DM) that can support dynamic multi-owner scenarios. We introduce a management entity that combines linear secret-sharing technology, multi-owner signature generation, and an aggregation technique to allow multi-owner file sharing. Without the help of trusted third parties, VDS-DM can update file signatures for dynamically changing file owners, which helps save communication overhead. Moreover, users independently verify the integrity of files without resorting to a third party. We analyse the security of VDS-DM through a security game. Finally, we conduct enough simulation experiments and the outcomes of experimental demonstrate the feasibility of VDS-DM.