A Searchable Encryption Scheme Based on Lattice for Log Systems in燘lockchain

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 quantumbased 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.

A New Lattice-Based Blind Ring Signature for Completely Anonymous Blockchain Transaction Systems

“…Secondly, we will introduce the proposed blind ring signature algorithm into more specific blockchain application scenarios, such as medical blockchain and blockchain-enabled Internet of ings. Finally, we will study more cryptographic methods for blockchain data privacy protection, such as searchable encryption [32,33], to improve blockchain privacy protection mechanisms.…”

Authentication and Key Agreement Algorithm for Handover of Next-Generation High-Speed Railway

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