Content Provider	IEEE Xplore Digital Library
Author	Lang, Bo Xu, Runhua Duan, Yawei
Copyright Year	2013
Description	Author affiliation: School of Computer Science & Engineering, Beihang University, 37# Xueyuan Road, Beijing, China (Lang, Bo; Xu, Runhua; Duan, Yawei)
Abstract	Ciphertext-Policy Attribute Based Encryption (CP-ABE) is recognized as an important data protection mechanism in cloud computing environment for its flexible, scalable and fine-grained access control features. For enhancing its security, efficiency and policy flexibility, researchers have proposed different schemes of CP-ABE which have different kinds of access policy structures. However, as far as we know, most of these structures only support AND, OR and threshold attribute operations. In order to achieve more effective data self-protection mechanisms in open environments such as Cloud computing, CP-ABE needs to support more flexible attribute based policies, most of which are described using operators of NOT, <, ≤, >, ≥. This paper proposed an Extended CP-ABE(ECP-ABE) scheme based on the existing CP-ABE scheme. The ECP-ABE scheme can express any access policy represented by arithmetic comparison and logical expressions that involve NOT, <, ≤, >, ≥ operators in addition to AND, OR and threshold operators. We prove the Chosen-plaintext Attack (CPA) security of our scheme under the Decisional Bilinear Diffie-Hellman (DBDH) assumption in the standard model, and also discuss the experimental results of the efficiency of ECP-ABE.
Starting Page	1
Ending Page	11
File Size	546405
Page Count	11
File Format	PDF
ISBN	9789897581311
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-07-29
Publisher Place	Iceland
Access Restriction	Subscribed
Rights Holder	SCITEPRESS
Subject Keyword	Access control Cloud computing Cloud Computing Ciphertext-Policy Attribute Based Encryption (CP-ABE) Attribute Based Access Control Logic gates Extended CP-ABE Encryption Standards
Content Type	Text
Resource Type	Article

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