Enhanced Provable Data Possession in Cloud Computing with Multiple Owners

Cheng-Yu Yang¹

¹ Department of Communication Engineering National Central University, Taiwan; 995403005@cc.ncu.edu.tw

Cheng-Ta Huang²

² Department of Information Management, Oriental Institute of Technology, Taiwan; cthuang@mail.oit.edu.tw

Ya-Ping Wang³

³ Foresight and Innovation Section of Information Management Office, National Police Agency, Ministry of the Interior, Taiwan;

kate@npa.gov.tw

Yen-Wen Chen⁴

⁴ Department of Communication Engineering, National Central University, Taiwan; ywchen@ce.ncu.edu.tw

Shiuh-Jeng WANG ^5,*

⁵ Department of Information Management, Central Police University, Taiwan;

* Correspondence: sjwang@mail.cpu.edu.tw; Tel.: +886-3-3282321 ext. 4807

楊誠育

中央大學通訊工程所

黃正達

亞東技術學院資訊管理系

王雅平

警政署資訊室

陳彥文

中央大學通訊工程所

王旭正

中央警察大學資訊管理研究所

*Correspondence: sjwang@mail.cpu.edu.tw

摘要

由於行動裝置對雲端資源存取的需求，因此雲端計算和雲端儲存服務日益重要。雲端環境提供的外部儲存服務已經成為一個常見並且隨處可取用的使用者資料存取平台。然而，使用者終究無法如同本機內部硬碟般存取外部雲端儲存資料，以致外部儲存服務無法得到使用者的完全信任。對於前述情形，本研究提出高效率的遠端資料稽核方法，讓使用者以較低計算成本，驗證雲端儲存資料的完整性。本研究基於橢圓曲線雙線性特點，發展雲端儲存的資料儲存證明協定，更易於進行批次的查驗。與其他研究相較，本研究具有高安全性和較高效能。

關鍵詞：雲端安全；資料儲存證明協定；公開稽核服務；密碼學

Abstract

Cloud computing and cloud storage are important developments because they can be accessed by mobile devices. The outsourced storage in cloud environment has become a stable, location-independent platform for managing user data. However, the outsourced data are not trustworthy because they cannot be accessed locally by users. This paper proposes an efficient remote data auditing method, which allows the client to check data possession in cloud storage at a lower computational cost. This study developed an improved provable data possession protocol technique based on the bilinear arithmetic of elliptic curves for cloud storage system, where batch and frequent integrity check is easy to perform completely. Comparisons with other state-of-the-art schemes show that the proposed scheme is highly secure and efficient.

Keywords: cloud security; provable data possession protocol; public audit service; cryptography