A Ciphertext-Policy Attribute-Based Encryption Scheme Supporting Keyword Search Function
With the advent of cloud computing, more and more individ uals and companies are motivated to outsource their data and services to clouds.As for the privacy and security reasons, sensitive data should be encrypted prior to outsourcing.However, encrypted data will hamper ef ficient query processing and fined-grained data sharing.In this paper, we propose a new cryptographic primitive called ciphertext-policy attribute based encryption scheme with keyword search function (KSF-CP-ABE) to simultaneously solve above issues.When a data owner wants to out source sensitive data in the public cloud, he/she encrypts the sensitive data under an access policy and also build a secure index for the set of keywords.Only authorized users whose credentials satisfy the access policy can retrieve this encrypted data through keyword search and de crypt the ciphertext.We also present a concrete KSF-CP-ABE construc tion from bilinear pairings and proved that the proposed KSF-CP-ABE scheme is secure against both outer attacks and inner attacks.Whats more, cloud service provider can perform partial decryption task dele gated by data user.
cloud computing ciphertext-policy attribute-based encryption public key encryption with keyword search bilinear pairings
Changji Wang Wentao Li Yuan Li Xilei Xu
School of Information Science and Technology,Sun Yat-sen University,Guangzhou 510006,China;Research School of Information Science and Technology,Sun Yat-sen University,Guangzhou 510006,China
国际会议
The 5th International Symposium on Cyberspace Safety and Security ( CSS2013)(第五届国际网络空间安全和安保研讨会)
张家界
英文
377-386
2013-11-13（万方平台首次上网日期，不代表论文的发表时间）