A cloud storage access scheme with security proxy based on attribute mapping node

With the development of mobile technology, more and more people use cloud storage to back up their local data. The cloud platforms provide cheap and convenient data storage services while there are serious data security problems, especially the ciphertext data access control being totally dependent on the cloud provider. An advanced CP-ABE scheme based on mapping nodes was presented to prevent illegal access from unauthorized users or partially trusted cloud storage providers. In order to guarantee the security of cloud data in open environment, Key Generation Center and Security Proxy are introduced to separate the data service and security service in the access scheme. Experimental results show that the proposed attribute management scheme is capable of separating the secret key from data service at a low computational cost, showing great potential for applications.