支持灵活授权的基于身份的加密相等性测试方案  

Identity-Based Encryption with Equality Test Scheme Supporting Flexible Authorization

作　　者：张琦 李嘉伟[1] 林喜军[1] 曲海鹏[1] ZHANG Qi;LI Jiawei;LIN Xijun;QU Haipeng(College of Information Science and Engineering,Ocean University of China,Qingdao,Shandong 266000,China)

机构地区：[1]中国海洋大学信息科学与工程学院

出　　处：《计算机工程》2019年第7期176-180,共5页Computer Engineering

基　　金：国家自然科学基金(61379127)

摘　　要：基于身份的加密相等性测试(IBEET)方案可在保证数据机密性的同时简化密钥和证书的管理,但其缺少对授权粒度的控制,难以满足实际应用中不同数据粒度的管理需求。为此,引入任意用户级别、任意密文级别、指定用户级别和密文-用户级别4种不同类型的授权机制,基于非对称的双线性映射,构建支持灵活授权的IBEET方案,并给出相关定义及安全模型。分析结果表明,该方案具有OW-ID-CCA安全性,能实现用户隐私保护。The Identity-Based Encryption with Equality Test(IBEET) scheme can simplify the management of keys and certificates while ensuring data confidentiality,but it lacks control over the granularity of authorization,making it difficult to meet the management needs of different data granularities in practical applications.Therefore,random user level,random ciphertex level,specified user level and ciphertext-user level mechanisms are introduced.Based on asymmetric bilinear mapping,an IBEET scheme supporting flexible authorization is constructed,and related definitions and security models are given.The analysis results show that the scheme has the OW-ID-CCA security and can realize user privacy protection.

关 键 词：基于身份的加密 相等性测试 公有云 灵活授权 隐私保护 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术]