@inproceedings{46f1f26de5cb4702ac6deab3d2093086,
title = "Private conjunctive query over encrypted data",
abstract = "In this paper, we propose an efficient protocol to process a private conjunctive query over encrypted data in the cloud using the somewhat homomorphic encryption (SwHE) scheme with a batch technique. In 2016, Cheon, Kim, and Kim (CKK) [IEEE Trans. Inf. Forensics Security] showed conjunctive query processing over encrypted data using search-and-compute circuits and an SwHE scheme and mentioned that their scheme should be improved in performance. To improve the performance of processing a private conjunctive query, we also propose a new packing method to support an efficient batch computation for our protocol using a few multiplications. Our implementation shows that our protocol works more than 50 times as fast as the CKK protocol for conjunctive query processing. In addition, the security level of our protocol is better than the security level of the CKK protocol.",
keywords = "Conjunctive, Data, Encrypted, Homomorphic encryption, Packing method, Private, Query processing",
author = "Saha, {Tushar Kanti} and Takeshi Koshiba",
note = "Publisher Copyright: {\textcopyright} Springer International Publishing AG 2017.; 9th International Conference on the Theory and Application of Cryptographic Techniques in Africa, AFRICACRYPT 2017 ; Conference date: 24-05-2017 Through 26-05-2017",
year = "2017",
doi = "10.1007/978-3-319-57339-7_9",
language = "English",
isbn = "9783319573380",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Verlag",
pages = "149--164",
editor = "Abderrahmane Nitaj and Marc Joye",
booktitle = "Progress in Cryptology - AFRICACRYPT 2017 - 9th International Conference on Cryptology in Africa, Proceedings",
}