A secured proxy-based data sharing module in IoT environments using blockchain
Genre
Journal ArticleDate
2019-03-01Author
Agyekum, KOBOXia, Q
Sifah, EB
Gao, J
Xia, H
Du, X
Guizani, M
Subject
Attribute-Based Encryption (ABE)blockchain
cyber-security
fine-grained access control
Inner-Product Encryption (IPE)
Internet of Things (IoT)
proxy re-encryption
Permanent link to this record
http://hdl.handle.net/20.500.12613/4570
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Show full item recordDOI
10.3390/s19051235Abstract
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. Access and utilization of data are central to the cloud computing paradigm. With the advent of the Internet of Things (IoT), the tendency of data sharing on the cloud has seen enormous growth. With data sharing comes numerous security and privacy issues. In the process of ensuring data confidentiality and fine-grained access control to data in the cloud, several studies have proposed Attribute-Based Encryption (ABE) schemes, with Key Policy-ABE (KP-ABE) being the prominent one. Recent works have however suggested that the confidentiality of data is violated through collusion attacks between a revoked user and the cloud server. We present a secured and efficient Proxy Re-Encryption (PRE) scheme that incorporates an Inner-Product Encryption (IPE) scheme in which decryption of data is possible if the inner product of the private key, associated with a set of attributes specified by the data owner, and the associated ciphertext is equal to zero (0). We utilize a blockchain network whose processing node acts as the proxy server and performs re-encryption on the data. In ensuring data confidentiality and preventing collusion attacks, the data are divided into two, with one part stored on the blockchain network and the other part stored on the cloud. Our approach also achieves fine-grained access control.Citation to related work
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http://dx.doi.org/10.34944/dspace/4552