关键词: 云计算, 数据安全, 属性基加密, 密钥策略属性基加密, 密文策略属性基加密

Abstract: Cloud computing has become the mainstream form of information sharing at present, but the openness of cloud computing platform, the uneven distribution of terminals and the complexity of network interconnection make it more vulnerable to network attacks such as virus infection and information leakage than in the past. In order to ensure that user data is not illegally accessed, the data is usually encrypted and then stored in the cloud. The traditional encryption mechanism can not meet the needs of multi-fine-grained access control in new environment such as cloud computing. Based on the basic principle of attribute-based encryption mechanism, attribute-based encryption mechanism in cloud computing is systematically studied in this paper, and then its security is compared and analyzed in depth.

Key words: cloud computing, data security, ABE, KP-ABE, CP-ABE