NDLI: Hierarchical attribute-based encryption for fine-grained access control in cloud storage services

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Hierarchical attribute-based encryption for fine-grained access control in cloud storage services

Content Provider	ACM Digital Library
Author	Wu, Jie Wang, Guojun Liu, Qin
Abstract	Cloud computing, as an emerging computing paradigm, enables users to remotely store their data into a cloud so as to enjoy scalable services on-demand. Especially for small and medium-sized enterprises with limited budgets, they can achieve cost savings and productivity enhancements by using cloud-based services to manage projects, to make collaborations, and the like. However, allowing cloud service providers (CSPs), which are not in the same trusted domains as enterprise users, to take care of confidential data, may raise potential security and privacy issues. To keep the sensitive user data confidential against untrusted CSPs, a natural way is to apply cryptographic approaches, by disclosing decryption keys only to authorized users. However, when enterprise users outsource confidential data for sharing on cloud servers, the adopted encryption system should not only support fine-grained access control, but also provide high performance, full delegation, and scalability, so as to best serve the needs of accessing data anytime and anywhere, delegating within enterprises, and achieving a dynamic set of users. In this paper, we propose a scheme to help enterprises to efficiently share confidential data on cloud servers. We achieve this goal by first combining the hierarchical identity-based encryption (HIBE) system and the ciphertext-policy attribute-based encryption (CP-ABE) system, and then making a performance-expressivity tradeoff, finally applying proxy re-encryption and lazy re-encryption to our scheme.
Starting Page	735
Ending Page	737
Page Count	3
File Format	PDF
ISBN	9781450302456
DOI	10.1145/1866307.1866414
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2010-10-04
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Fine-grained access control Cloud computing Hierarchical attribute-based encryption Scalability
Content Type	Text
Resource Type	Article

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