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学术讲座【KSF-OABE: Outsourced Attribute-Based Encryption with Keyword Search Function for Cloud Storage】

时间:2016-01-15浏览:1227设置

时间:2016116日(周六)1500

地点:仓山校区成功楼601会议室

主讲:河海大学  李继国教授

主办:数学与计算机科学学院、福建省网络安全与密码技术重点实验室

专家简介:李继国,河海大学教授、博士生导师。2003年毕业于哈尔滨工业大学计算机科学与技术学院,获工学博士学位。曾先后应邀在澳大利亚卧龙岗大学、美国德州大学(圣安东尼奥分校)网络空间安全研究所访问学习。主要研究方向:密码学理论与技术、网络信息安全、云计算安全等。作为项目负责人主持和完成多项国家及部省级项目。在Journal of Computer SecurityInformation SciencesJournal of Systems and SoftwareThe Computer JournalIET Information SecurityJCSTIJNSSCN等学术期刊和EuroPKI07等国际会议发表学术论文100余篇,其中,SCIEI已收录70余篇,论文Google引用1500余次。申请密码与信息安全相关的发明专利26项,已授权8项。获2004年度江苏省高校“青蓝工程”优秀青年骨干教师培养人选,2008年入选河海大学首批优秀创新人才计划,2009年入选江苏省“六大人才高峰”第六批高层次人才项目资助计划,2010年江苏省优秀硕士学位论文指导教师。

报告摘要:Cloud computing becomes increasingly popular for data owners to outsource their data to public cloud servers while allowing intended data users to retrieve these data stored in cloud. This kind of computing model brings challenges to the security and privacy of data stored in cloud. Attribute-based encryption (ABE) technology has been used to design fine-grained access control system, which provides one good method to solve the security issues in cloud setting. However, the computation cost and ciphertext size in most ABE schemes grow with the complexity of the access policy. Outsourced ABE (OABE) with fine-grained access control system can largely reduce the computation cost for users who want to access encrypted data stored in cloud by outsourcing the heavy computation to cloud service provider (CSP). However, as the amount of encrypted files stored in cloud is becoming very huge, which will hinder efficient query processing. To deal with above problem, we present a new cryptographic primitive called attribute-based encryption scheme with outsourcing key-issuing and outsourcing decryption, which can implement keyword search function (KSF-OABE). The proposed KSF-OABE scheme is proved secure against chosen-plaintext attack (CPA). CSP performs partial decryption task delegated by data user without knowing anything about the plaintext. Moreover, the CSP can perform encrypted keyword search without knowing anything about the keywords embedded in trapdoor.

 

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