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Forward-Secure Data Outsourcing Based on Revocable Attribute-Based Encryption | IEEE Conference Publication | IEEE Xplore

Forward-Secure Data Outsourcing Based on Revocable Attribute-Based Encryption


Abstract:

In cloud-based storage services, Ciphertext-Policy Attribute Based Encryption (CP-ABE) has been emerging as a promising outsourcing solution to provide data confidentiali...Show More

Abstract:

In cloud-based storage services, Ciphertext-Policy Attribute Based Encryption (CP-ABE) has been emerging as a promising outsourcing solution to provide data confidentiality protection and fine-grained data access management without relying on the Cloud. CP-ABE schemes enable data owner to encrypt data under a desired access structure before outsourcing it to the Cloud. Only those who own a certified attribute set, which matches with the access structure, can decrypt the encrypted data. Despite the advantages over conventional encryption algorithms, attribute and user revocations of CP-ABE schemes remain challenging. Firstly, existing revocation mechanisms cannot thoroughly solve the problem as they give rise to security issues and increases computational, communication overheads. Secondly, forward secrecy, in which revoked users are unable to decrypt data shared in the past, is not rigorously taken into account. In this paper, we investigate these problems and design two CP-ABE schemes that allow both efficient user and attribute revocations. The forward secrecy requirement of the proposed schemes is guaranteed by integrating re-encryption techniques. To demonstrate the feasibility of the proposals, we evaluate their performance and provide a security analysis.
Date of Conference: 24-28 June 2019
Date Added to IEEE Xplore: 22 July 2019
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Conference Location: Tangier, Morocco

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