Block verifiable dynamic searchable encryption using redactable blockchain

【Author】 Du, Ruizhong; Liu, Na; Li, Mingyue; Tian, Junfeng

【Source】JOURNAL OF INFORMATION SECURITY AND APPLICATIONS

【影响因子】4.960

【Abstract】To solve the problems of low efficiency, inflexible updates and the high storage cost of existing result verifiable searchable encryption schemes, we propose a dynamic searchable encryption scheme with block verification using redactable blockchain. First, the inverted index is divided into blocks, the verification tag corresponding to the block index is uploaded to the redactable blockchain, and smart contracts are used to perform block verification of the query results to improve the query and verification performance. Furthermore, we use the blockchain rewriting technology to update the tags in the result checklist, improving the data update performance and scalability of the blockchain, and ensuring the constant storage overhead of the blockchain. Security analysis confirms that our proposals guarantee the correctness and completeness of the query results. Experimental results show that our proposed approach can improve the query efficiency and result verification efficiency under the premise of the low-speed growth of the blockchain data scale. In particular, the advantages become more significant as the data collection scale grows.

【Keywords】Searchable encryption; Redactable blockchain; Block index; Result verification; Smart contract

【发表时间】2023 JUN

【收录时间】2023-06-27

【文献类型】理论性文章

【主题类别】

区块链技术-核心技术-加密算法