An authorization model for multi-tenancy services in cloud

Cloud computing is a set of resources and services offered through the Internet. The services of cloud are delivered from data centers located all over the world. Multi-tenancy is the common feature of public cloud and private cloud. Multi-tenancy service is defined as the capability of a single software instance to provide its service to several parties simultaneously. In cloud computing, multi-tenancy service has many advantages. Compared with traditional softwares, multi-tenancy service can lower the software´s cost, get more profit and have obvious advantages and prospects. Under this condition, the security problems of multi-tenancy in cloud become important. This paper studies the multi-tenancy service in cloud, and presents an authorization model and the architecture of the model. This authorization model can provide a convenient authorization service for multi-tenancy services in cloud.