关键词: 云存储, HDFS, 访问控制, 信任值

Abstract: At present, more and more people employ cloud storage to store or backup data in order to enhance the data removability. For the security of cloud storage, researchers mainly focus on privacy disclosure, data disaster tolerance, duplication eliminating and so on. However, few researchers pay attention to access control technology. On the basis of previous research, this paper proposes an access control model for HDFS (Hadoop distributed file system) based on user trust value. The model uses the trusted third party authentication system Kerberos for user authentication, sets a trust value for each user, and controls user access to HDFS dynamically by comparing the trust value and trust threshold. The experimental results show that the model overcomes the shortages of HDFS access control, furthermore, it can also control user access to the HDFS resources dynamically and effectively.

Key words: cloud storage, Hadoop distributed file system (HDFS), access control, trust value