密码学报2023，Vol.10Issue(6)：1165-1182,18.DOI:10.13868/j.cnki.jcr.000662
基于区块链上策略密文检索的属性访问控制方案
An Attribute-Based Access Control Scheme Based on Blockchain and Policy Ciphertext Searching
摘要
Abstract
Most of the existing attribute-based access control(ABAC)techniques utilize centralized subjects,and the centralized structure brings problems such as low scalability,weak synchronization,and lack of trust.Blockchain is a decentralized technology with advantages such as traceability,tamper-proof,and scalability.Based on these characteristics,this paper proposes an attribute access control scheme based on policy ciphertext retrieval on blockchain(BPCS-ABAC),which introduces blockchain and smart contract technology into the traditional access control scheme and uses smart contract technology to realize fine-grained judgments on access requests in ABAC,aiming to solve the problems of traditional access control,i.e.,being over-relying on centralized entities and access control policy problems such as poor privacy of data.In addition,to reduce the storage pressure caused by the increase of access control policies and to enhance the privacy of access control policies,the BPCS-ABAC scheme uses public key searchable cryptography to encrypt the access control policies.Simulation results show that the proposed BPCS-ABAC scheme performs better than previous schemes in terms of access time,policy search time,trapdoor matching time,ciphertext and trapdoor generation time,and space consumption.关键词
区块链/隐私保护/属性访问模型/可搜索加密Key words
blockchain/privacy protection/attribute access model/searchable encryption分类
计算机与自动化引用本文复制引用
陈立全,贾继广,王泽雨,于坤良..基于区块链上策略密文检索的属性访问控制方案[J].密码学报,2023,10(6):1165-1182,18.基金项目
国家自然科学基金(U22B2026,62002058) （U22B2026,62002058）
国家重点研发计划(2020YFE0200600)National Natural Science Foundation of China(U22B2026,62002058) （2020YFE0200600）
National Key Research and Development Program of China(2020YFE0200600) （2020YFE0200600）
