移动社交网络多密钥混淆的交友隐私保护方案研究  

A Privacy Preserving Friend Discovery Multi Key Obfuscation Scheme in Mobile Social Networks

作　　者：罗恩韬 陈淑红 王文博 张少波[4] PINIAL Khan-butt LUO En-tao;CHEN Shu-hong;WANG Wen-bo;ZHANG Shao-bo;PINIAL Khan-butt(School of Electronics and Information Engineering,Hunan University of Science and Engineering,Yongzhou,Hunan 425199,China;School of Computer Science and Educational Software,Guangzhou University,Guangzhou,Guangdong 510006,China;School of Computer Science and Educational Software,Canada McMaster University,Hamilton L8R 5G8,Canada;School of Computer and Engineering,Hunan University of Science and Technology,Xiangtan,Hunan 411101,China;Information Technology Center,Sindh Agriculture University,Tandojam 70060,Pakistan)

机构地区：[1]湖南科技学院电子与信息工程学院,湖南永州425199 [2]广州大学计算机科学与教育软件学院,广东广州510006 [3]加拿大麦特马斯特大学计算机与软件学院,加拿大汉密尔顿L8R5G8 [4]湖南科技大学计算机与工程学院,湖南湘潭411101 [5]信德农业大学信息技术中心,巴基斯坦信德70060

出　　处：《电子学报》2018年第9期2123-2130,共8页Acta Electronica Sinica

基　　金：国家自然科学基金重点资助项目(No.61632009);国家自然科学基金面上资助项目(No.61472451,No.61272151);国家自然科学基金青年资助项目(No.61502163);湖南省自然科学基金2018面上项目(No.2018JJ2147);湖南省自然科学基金青年项目(No.2016JJ3051);湖南省教育厅科研计划(No.2015C0589);湖南省重点研发计划(No.2017NK2390);湖南科技学院计算机应用技术重点建设学科资助(No.128030219-001)

摘　　要：在移动社交网络中,为保证交友匹配过程中用户的隐私,提出多密钥混淆隐私保护方案.利用代理重加密技术,对用户密钥密文进行重新加密,实现了以扩充交友访问策略条件的交友匹配,并保证密文转换过程中用户的隐私不被泄露;利用随机密文组件加密技术,实现了对真实明文对应加密文件的信息隐藏,提高了攻击者的破解难度;利用数据摘要签名技术,解决了以往方案未考虑的多加密文件对应的文件解密问题.安全和实验分析表明,本文方案可以达到CPA(Chosen Plaintext Attack)安全,可以保证交友用户的隐私不被泄露,并且比既有的方案更有效.In mobile social networks,in order to ensure the privacy of users in the process of friend matching,a privacy protection scheme for multiple keys is proposed.Proxy re-encryption technology is utilized to encrypt the user’s key into ciphertext,expand friend matching access policy conditions and ensure no leakage of the ciphertext of user privacy during the process of transformation.The employed encryption technology of random ciphertext components can realize the hidden information of the plainntext,and improve the crack difficulty of the attacker.Multiple encrypted files decryption problem is solved by data signature technology,which are not considered by previous works.Security and experimental analysis show that this scheme can achieve CPA(Chosen Plaintext Attack)security,ensure the privacy of friend discovery,and that is more effective than existing solutions.

关 键 词：多密钥混淆 代理重加密 数据签名 隐私保护 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]