云存储系统中支持用户隐私保护的细粒度访问控制

doi:10.3969/j.issn.1000-436x.2014.z2.007

Abstract

Abstract:

Based on the actual demands of cloud storage system,a new multi-authority ABE (MA-ABE) scheme is constructed to support user privacy protection and attribute revocation.For enhancing efficiency and alleviatingowner’s computing load，the complex computing works involved in attribute revocation are delegated to a trusted third party orcloud server.The proposed scheme is provably secure under the DBDH assumption.

Key words: cloud storage, attribute based encryption, multi-authority, privacy protection, attribute revocation

Min XIAO,Chun-lei WANG,You-sheng ZHOU. Fine-grained access control scheme with user privacy protection in cloud storage systems[J]. Journal on Communications, 2014, 35(Z2): 42-47.

Figures/Tables 1

User u		Attribute Authority
$ρ_{1} \in Z_{q}$	$\overset{2 P C}{\leftrightarrow}$	$x : = (β + u) ρ_{1}, τ \in Z_{q}$
$ρ_{2} \in Z_{q}$	$\overset{X_{1}, X_{2} P o K α τ x}{\leftarrow}$	$X_{1} : = l^{τ / x}, X_{2} = h^{α τ}$
$Y : = {(X_{1}^{ρ_{1}} X_{2})}^{ρ_{2}}$	$\overset{Y, P o K ρ_{2}}{\to}$
$D : = Z^{1 / ρ_{2}}$	$\overset{Z, P o K (τ γ)}{\leftarrow}$	$Z : = Y^{γ / τ}$

References 11

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Fine-grained access control scheme with user privacy protection in cloud storage systems

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