密码学报（中英文）2025，Vol.12Issue(1)：49-68,20.DOI:10.13868/j.cnki.jcr.000748
云辅助医疗物联网中支持策略隐藏的可搜索属性加密方案
A Searchable Attribute-Based Encryption Scheme Supporting Policy Hiding in Cloud-Assisted Internet of Medical Things
摘要
Abstract
Cloud-assisted Internet of Medical Things(IoMT)system is a new trend in the develop-ment of smart medical care.Nevertheless,patients'privacy data is usually outsourced and stored in the cloud in a confidential form,which will cause the data owner to lose control over their own data and cause inconvenience in patient data retrieval.Aiming at the above issues,this study proposes a searchable attribute-based encryption scheme that supports policy hiding.This scheme combines the advantages of ciphertext-policy attribute-based encryption and public key searchable encryption to ensure the confidentiality of shared data in the cloud-assisted IoMT system,realize fine-grained access control of sensitive data,and support keyword search.Moreover,the computing overhead of resource-constrained devices is reduced by using methods such as online/offline encryption and outsourced decryption,so that the ciphertext-policy attribute-based encryption scheme can be implemented in the cloud-assisted IoMT system.Meanwhile,policy hiding technology is used to prevent the privacy of the data owner from leaking by hiding attribute values in the ciphertext.In terms of security,it is proved that the ciphertext information of this scheme is indistinguishable under chosen access structure and chosen plaintext attacks,and the trapdoor information is indistinguishable under chosen keyword attacks.Finally,Java Pairing-Based Cryptography Library(JPBC)is used to compare this scheme with other related schemes in terms of functional characteristics,communication overhead,and computing overhead.The results show that the proposed scheme has higher computational efficiency and lower storage overhead in key generation and encryption stages.关键词
在线/离线属性加密/外包解密/可搜索加密/策略隐藏/云辅助IoMT系统Key words
online/offline attribute-based encryption/outsourced decryption/searchable encryption/policy hiding/cloud-assisted IoMT system分类
计算机与自动化引用本文复制引用
郭瑞,杨鑫,贾晨阳,王俊茗..云辅助医疗物联网中支持策略隐藏的可搜索属性加密方案[J].密码学报（中英文）,2025,12(1):49-68,20.基金项目
国家自然科学基金(62072369) （62072369）
陕西省重点研发计划(2020ZDLGY08-04) （2020ZDLGY08-04）
陕西省创新能力支持计划(2020KJXX-052) （2020KJXX-052）
陕西省自然科学基础研究计划(2024JC-YBMS-545)National Natural Science Foundation of China(62072369) （2024JC-YBMS-545）
Key Research and Development Program of Shaanxi Province(2020ZDLGY08-04) （2020ZDLGY08-04）
Innovation Capability Support Program in Shaanxi Province of China(2020KJXX-052) （2020KJXX-052）
Natural Science Basic Research Plan in Shaanxi Province(2024JC-YBMS-545) （2024JC-YBMS-545）
