An Improved Ciphertext-Policy Attribute-Based Encryption Scheme

详细信息    查看全文

• 关键词：Cloud storage ; Access control ; Attribute ; based encryption ; Online/offline ; Security
• 刊名：Lecture Notes in Computer Science
• 出版年：2017
• 出版时间：2017
• 年：2017
• 卷：10135
• 期：1
• 页码：400-411
• 丛书名：Smart Computing and Communication
• ISBN：978-3-319-52015-5
• 卷排序：10135

文摘

According to characteristics of mass encryption service in cloud storage, this paper proposed an improved SCP-OOABE scheme which uses the access control tree as a control structure and decomposes key generation and encryption into online and offline phase respectively that could be finished in a short time in online phase. In addition, it also avoids the problem that CP-OOABE scheme can’t generate keys when constructing access control structures. What’s more, it meets the demand of the complex access control structure in cloud storage and was proved that the scheme is against chosen-plaintext attack secure. In a word, our scheme was security, efficient and universal, which suits for the demands of cloud storage.