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An efficient access policy with multi-linear secret-sharing scheme in ciphertext-policy attribute-based encryption

Author(s)
ANCY P R CSE Dept, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, India
ADDAPALLI V N KRISHNA CSE Dept, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, India
BALACHANDRAN K CSE Dept, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, India
BALAMURUGAN M CSE Dept, School of Engineering and Technology, CHRIST (Deemed to be University), Bangalore, India
Abstract
Ciphertext-Policy Attribute-Based Encryption (CP-ABE) is a system in which attribute are used for user's identity and data owner determine the access policy to the data to be encrypt. Here access policy are attached with the ciphertext. In the form of a monotone Boolean formula monotone access structure, an access policy can be interpreted and a linear secret-sharing scheme (LSSS) can be implemented. In recent CP-ABE schemes, LSSS is a matrix whose row represent attributes and there exist a general algorithm which is proposed by Lewko and Waters it transforms a Boolean formula into corresponding LSSS matrix. But we may want to transform the monotone Boolean formula to an analogous but compressed formula first before applying the algorithm. This is a very complex procedure and require efficient optimization algorithm for obtaining equivalent but smaller size Boolean formula. So in this paper we are introducing an extended LSSS called multi-linear secret-sharing scheme where we can eliminate above optimization algorithm and directly convert any Boolean formula to multi-linear secret-sharing scheme.
Publication Details
Page(s) 1404-1411
DOI DOI not available
Published Journal: Journal of Theoretical and Applied Information Technology, Volume: 100, Issue: 5, Year: 2022

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Keywords
Encryption, Ciphertext Policy Attribute Based Encryption, Multi-Linear Secret-Sharing Scheme, Access Policy
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