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Achieving Proof of Shared Ownership for the Shared File in Collaborative Cloud Applications

机译：在协作云应用程序中获得共享文件的共享所有权证明

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摘要

Collaborative cloud applications are increasingly popular in our daily life, and generate plenty of cooperative files. The ownerships of these files are jointly shared by all participants. However, it is still a challenge to keep secure access and storage to those shared files, while ensuring the cloud storage efficiency. To tackle this problem, in this paper, we formalize a novel notion called Proof of Shared oWnership (PoSW), and propose a specific PoSW scheme to implement both secure ownership verification and data deduplication. In the PoSW scheme, we employ the convergent encryption algorithm to protect the content confidentiality of the shared file, introduce the secret file dispersal and secret sharing algorithm to implement the shared authorization and file ownership, and construct a novel interaction protocol between the file owners and the cloud server to verify the shared ownership and achieve deduplication to the shared file. Security analysis and performance evaluation show the security and efficiency of the proposed scheme.
机译：协作云应用程序在我们的日常生活中越来越受欢迎，并且会生成大量的协作文件。这些文件的所有权由所有参与者共同共享。但是，在确保云存储效率的同时，保持对这些共享文件的安全访问和存储仍然是一个挑战。为了解决这个问题，在本文中，我们将一种新颖的概念正式化，称为共享所有权证明（PoSW），并提出一种特定的PoSW方案来实现安全所有权验证和重复数据删除。在PoSW方案中，我们采用收敛加密算法来保护共享文件的内容机密性，引入秘密文件分发和秘密共享算法以实现共享授权和文件所有权，并构造文件所有者与文件所有者之间新颖的交互协议。云服务器以验证共享所有权并实现对共享文件的重复数据删除。安全分析和性能评估表明了该方案的安全性和有效性。

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