山西大学学报（自然科学版）2025，Vol.48Issue(5)：933-945,13.DOI:10.13451/j.sxu.ns.2024029
智慧医疗中具有策略完全隐藏的属性基加密方案
Attribute-based Encryption Scheme with Policies Fully Hidden in Smart Health
摘要
Abstract
With the rapid development of the Internet of Things and cloud computing technologies,the quality of healthcare in smart health has been significantly improved,but the healthcare system still has the problems of data security and user privacy leakage.Ci-phertext-Policy Attribute Based Encryption(CP-ABE)is considered to be one of the most effective solutions at present.However,in most CP-ABE schemes attackers can obtain user privacy information from access policies.Since the decryption key is only associat-ed with attributes and not with the user's identity,it is impossible to accurately confirm the user's identity when the key is leaked.To resolve the above problems,this paper proposes a traceable and revocable CP-ABE scheme with policies fully hidden by using Pri-vate Set Intersection(PSI)technology to hide the attribute values and attribute names in the policy.Furthermore,this paper adopts bi-nary tree associated with information to track and revoke users.In order to enhance the speed of the scheme in the encryption and de-cryption phases,this paper introduces the skill of offline/online encryption and outsourced decryption techniques.Finally,based on the q-BDHE assumption,the security of the scheme is proved.The experiment results show that the encryption and decryption algo-rithms of this scheme take a constant amount of time,which is a significant improvement in efficiency compared to other schemes.关键词
策略完全隐藏/隐匿集合求交/可追踪/可撤销/在线/离线加密/外包解密Key words
policy fully hidden/private set intersection/traceability/revocation/online/offline encryption/outsourced decryption分类
信息技术与安全科学引用本文复制引用
郭丽峰,徐卓恒,刘华..智慧医疗中具有策略完全隐藏的属性基加密方案[J].山西大学学报（自然科学版）,2025,48(5):933-945,13.基金项目
山西省自然科学基金(202203021221012) （202203021221012）
