Abstract: It proposed a novel secure cloud storage model (ASOM), based on HDFS. Through isolating the metadata from the physical storage and the communication between Data nodes and metadata subservers, the ASOM model can guarantee secure metadata management. The main advantages of our approach include avoiding the superposition of complex security policies and the mistrust between the users and the platform. Furthermore, our security storage service can be easily integrated into the cloud computing environment.

Key words: Hadoop, cloud storage, HDFS, ASOM model