密码学报2024，Vol.11Issue(3)：621-636,16.DOI:10.13868/j.cnki.jcr.000698
支持去中心化存储的分块可搜索对称加密
A Searchable Symmetric Encryption Scheme for Block-Wise Decentralized Storage
摘要
Abstract
Searchable encryption has undergone years of development to facilitate searching and even complex operations on ciphertext data.However,with the popularity of block-wise decentral-ized storage applications,existing searchable encryption schemes do not meet efficiency requirement.Particularly,when dealing with large indexes,retrieving entities must download the entire index file,leading to a significant low efficiency.To address this issue,this paper proposes a searchable symmet-ric encryption scheme based on block-wise encrypted indexes.By introducing a two-level index,only index blocks containing the keywords are accessed during retrieval,thereby significantly enhancing search efficiency.Furthermore,through the integration of blockchain and smart contracts,the pro-posed scheme can establish a fair transaction environment between data owners and users,effectively meeting the application requirements of ciphertext retrieval in decentralized storage.Experimental re-sults demonstrate that the proposed scheme achieves search efficiency dependent only on the number of documents hit by the search keywords,particularly in scenarios with large document collections.Additionally,it offers advantages in terms of storage overhead,computational cost,Gas consumption,and other metrics.关键词
可搜索对称加密/分块索引/区块链/智能合约/星际文件系统Key words
SSE/block-wise index/blockchain/smart contracts/IPFS(inter planetary file system)分类
信息技术与安全科学引用本文复制引用
徐飞,王涛,杨波,张文政..支持去中心化存储的分块可搜索对称加密[J].密码学报,2024,11(3):621-636,16.基金项目
保密通信国防科技重点实验室开放基金(61421030108022110) （61421030108022110）
西安电子科技大学综合业务网理论及关键技术国家重点实验室开放课题(ISN23-23) （ISN23-23）
国家自然科学基金(U2001205) （U2001205）
陕西省重点研发一般项目—工业领域(2023-YB-GY-214)Open Fund of Science and Technology On Communication Security Laboratory(61421030108022110) （2023-YB-GY-214）
Open Fund of State Key Laboratory of Integrated Services Networks,Xidian University(ISN23-23) （ISN23-23）
National Natural Science Foundation of China(U2001205) （U2001205）
Key Research and Development Program of Shaanxi Province(2023-YB-GY-214) （2023-YB-GY-214）
