دانلود رایگان مقاله حسابرسی کارآمد برای داده های ابر با لغو امنیت کاربر و محاسبات برون سپاری

عنوان فارسی
حسابرسی کارآمد برای داده های به اشتراک گذاشته شده در ابر با لغو امنیت کاربر و محاسبات برون سپاری
عنوان انگلیسی
Efficient auditing for shared data in the cloud with secure user revocation and computations outsourcing
صفحات مقاله فارسی
0
صفحات مقاله انگلیسی
35
سال انتشار
2018
نشریه
الزویر - Elsevier
فرمت مقاله انگلیسی
PDF
کد محصول
E5608
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کامپیوتر
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رایانش ابری
مجله
کامپیوترها و امنیت - Computers & Security
دانشگاه
College of Computer - National University of Defense Technology - Changsha - China
کلمات کلیدی
ذخیره سازی ابر، حسابرسی عمومی، لغو کاربر، برون سپاری، محیط متحرک
چکیده

Abstract


With the cloud storage services, users can easily form a group and share data with each other. Considering the cloud is untrusted, public auditing is needed to ensure the integrity of the shared data. Once a user is revoked from the group, signatures from this revoked users need to be re-computed by an existing user, which may incurs heavy communication and computation cost. Proxy re-signatures can be used here to allow the cloud to compute re-signatures on behalf of the group. However, a malicious cloud is able to arbitrarily convert signatures from one user to another using the re-signing keys. Moreover, collusion between revoked users and malicious clouds will disclose the secret values of the remaining users. In this paper, we propose a novel public auditing scheme for the integrity of shared data with efficient collusion-resistant user revocation. In addition, we extend the proposed scheme to support securely signature and verification outsourcing, which allow more efficiency for group users and the auditor. The numerical analyses and experimental results demonstrate that our scheme is provably secure and highly efficient, the outsourcing algorithms make the signatures generation and verification process more efficient and affordable for mobile devices.

نتیجه گیری

8. Conclusion


In this paper, we propose a novel public integrity auditing scheme for shared data in the cloud with efficient auditing and collusion-resistant user revocation. Utilizing the concept of Shamir secret sharing, our scheme allows the group together with the proxies and cloud to convert signatures from revoked users into ones from the existing users after their revocations. Meanwhile, collusion attack is practically infeasible during the re-signing process. Besides, the signatures outsourcing and verification outsourcing algorithms significantly save computations for the group users and the auditor, which makes our scheme more suitable for mobile computing environments. The numerical analysis and experimental results demonstrate that our scheme is secure and efficient, the total overhead of our auditing scheme is relatively small.


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