Open Access

ARTICLE

A Searchable Encryption Scheme Based on Lattice for Log Systems in Blockchain

Gang Xu¹, Yibo Cao¹, Shiyuan Xu¹, Xin Liu^2,*, Xiu-Bo Chen³, Yiying Yu¹, Xiaojun Wang⁴

1 School of Information Science and Technology, North China University of Technology, Beijing, 100144, China
2 School of Information Engineering, Inner Mongolia University of Science and Technology, Baotou, 014010, China
3 Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China
4 School of Electronic Engineering, Dublin City University, Dublin, Ireland

* Corresponding Author: Xin Liu. Email:

Computers, Materials & Continua 2022, 72(3), 5429-5441. https://doi.org/10.32604/cmc.2022.028562

Received 12 February 2022; Accepted 14 March 2022; Issue published 21 April 2022

Abstract

With the increasing popularity of cloud storage, data security on the cloud has become increasingly visible. Searchable encryption has the ability to realize the privacy protection and security of data in the cloud. However, with the continuous development of quantum computing, the standard Public-key Encryption with Keyword Search (PEKS) scheme cannot resist quantum-based keyword guessing attacks. Further, the credibility of the server also poses a significant threat to the security of the retrieval process. This paper proposes a searchable encryption scheme based on lattice cryptography using blockchain to address the above problems. Firstly, we design a lattice-based encryption primitive to resist quantum keyword guessing attacks. Moreover, blockchain is to decentralize the cloud storage platform’s jurisdiction of data. It also ensures that the traceability of keyword retrieval process and maintains the credibility of search result, which malicious platforms are prevented as much as possible from deliberately sending wrong search results. Last but not least, through security analysis, our proposed scheme satisfies the credibility and unforgeability of the keyword ciphertext. The comprehensive performance evaluates that our scheme has certain advantages in terms of efficiency compared with others.

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