Cloud based data sharing with fine-grained proxy re-encryption

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• 作者：Yanjiang Yang^a ; ^{yyang@i2r.a-star.edu.sg" class="auth_mail" title="E-mail the corresponding author} ; Haiyan Zhu^b ; Haibing Lu^c ; Jian Weng^d ; Youcheng Zhang^e ; Kim-Kwang Raymond Choo^f
• 关键词：Cloud computing ; Conditional proxy re-encryption ; User revocation ; Fine-grained encryption
• 刊名：Pervasive and Mobile Computing
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：28
• 期：Complete
• 页码：122-134
• 全文大小：457 K

文摘

Conditional proxy re-encryption (CPRE) enables fine-grained delegation of decryption rights, and has many real-world applications. In this paper, we present a ciphertext-policy attribute based CPRE scheme, together with a formalization of the primitive and its security analysis. We demonstrate the utility of the scheme in a cloud deployment, which achieves fine-grained data sharing. This application implements cloud server-enabled user revocation, offering an alternative yet more efficient solution to the user revocation problem in the context of fine-grained encryption of cloud data. High user-side efficiency is another prominent feature of the application, which makes it possible for users to use resource constrained devices, e.g., mobile phones, to access cloud data. Our evaluations show promising results on the performance of the proposed scheme.