The Lord of the Shares: Combining Attribute-Based Encryption and Searchable Encryption for Flexible Data Sharing

Michalas, A. 2019. The Lord of the Shares: Combining Attribute-Based Encryption and Searchable Encryption for Flexible Data Sharing. 34th ACM/SIGAPP Symposium on Applied Computing (SAC'19). Limassol, Cyprus 08 - 12 Apr 2019 ACM. doi:10.1145/3297280.3297297

TitleThe Lord of the Shares: Combining Attribute-Based Encryption and Searchable Encryption for Flexible Data Sharing
AuthorsMichalas, A.
TypeConference paper
Abstract

Secure cloud storage is considered one of the most important issues that both businesses and end-users are considering before moving their private data to the cloud. Lately, we have seen some interesting approaches that are based either on the promising concept of Symmetric Searchable Encryption (SSE) or on the well-studied field of Attribute-Based Encryption (ABE). In the first case, researchers are trying to design protocols where users' data will be protected from both internal and external attacks without paying the necessary attention to the problem of user revocation. On the other hand, in the second case existing approaches address the problem of revocation. However, the overall efficiency of these systems is compromised since the proposed protocols are solely based on ABE schemes and the size of the produced ciphertexts and the time required to decrypt grows with the complexity of the access formula. In this paper, we propose a protocol that combines both SSE and ABE in a way that the main advantages of each scheme are used. The proposed protocol allows users to directly search over encrypted data by using a SSE scheme while the corresponding symmetric key that is needed for the decryption is protected via a Ciphertext-Policy Attribute-Based Encryption scheme.

KeywordsAccess Control
Attribute-Based Encryption
Cloud Security
Hybrid Encryption
Policies
Storage Protection
Symmetric Searchable Encryption
Year2019
Conference34th ACM/SIGAPP Symposium on Applied Computing (SAC'19)
PublisherACM
Publication dates
Published08 Apr 2019
Journal citationpp. 146-155
Book titleSAC '19 Proceedings of the 34th ACM/SIGAPP Symposium on Applied Computing
Digital Object Identifier (DOI)doi:10.1145/3297280.3297297
Web address (URL) of conference proceedingshttps://dl.acm.org/citation.cfm?id=3297297
Web address (URL)https://dl.acm.org/citation.cfm?id=3297297

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