Access Control Framework in the Cloud based on Multi-Blockchain with Light Privacy Protection

The applications of the blockchain technology are still being discovered. When a new potential disruptive technology emerges, there is a tendency to try to solve every problem with that technology. With the expansion and intensity of cloud computing, cloud security has become a critical concern in the area. One of the most important security measures for securing sensitive data hosted in the cloud is access control. To overcome this problem, we offer a multi-blockchain access control architecture with lightweight privacy protection in cloud called Autherization-Privacy. We begin with account address of the node in blockchain as the unique id and at the same time, define the admission permission of data for cloud, which is cypher and kept in blockchain.