An Efficient Access Control Method for Cloud Services Based on Hierarchical Attribute-Based Encryption

• Main Authors: Che-Chia Pai, 白哲嘉
• Other Authors: I-En Liao
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/5yezk8

碩士 === 國立中興大學 === 資訊科學與工程學系 === 103 === As many enterprises adopt cloud services to support their daily operations, security issues in the cloud computing environment are of great concerns for them. One commonly used access control for cloud services is the attribute encryption based on hierarchical structure. To the best of our knowledge, the existing attribute-based encryption schemes concentrated on encrypting the whole data file, not partitions of data file. In this thesis, we proposed an efficient hierarchical attribute-based encryption and attribute revocation method for encrypting partitions of data files in cloud storage services. The experimental results show that the proposed scheme outperforms the Hierarchical Attribute-Based Encryption (HBAE) method in terms of the execution time for encryption, decryption, and attribute revocation. In case of revoking attribute rules, the proposed method only updates the parts of file related to the revoked attribute rules. It not only reduces the cost of encryption and decryption on the files but also ensures the data security.