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.

翻译：数据共享应用中的一个场景是文件由多个所有者管理，且文件所有者列表可能动态变化。然而，现有的大多数解决方案依赖可信第三方，且签名授权流程复杂，导致额外开销。因此，我们提出了一种可验证的数据共享方案（VDS-DM），可支持动态多方所有者场景。我们引入了一个管理实体，结合线性秘密共享技术、多方所有者签名生成及聚合技术，以实现多方所有者的文件共享。在无需可信第三方协助的情况下，VDS-DM能够为动态变化的文件所有者更新文件签名，从而节省通信开销。此外，用户可独立验证文件的完整性，无需依赖第三方。我们通过安全游戏分析了VDS-DM的安全性。最后，我们进行了充分的仿真实验，实验结果证明了VDS-DM的可行性。