A Hybrid Two Layer Attribute Based Encryption for Privacy Preserving in Public Cloud

Most of the current approaches are to secure confidential data hosted in cloud based on the attribute based encryption. Under such approaches, data owners are in charge of encrypting the data before uploading them and whenever user authorizations policies changes re-encrypting the data would performed. Thus the communication and computation cost at owner side is high. While assuring data confidentiality from the cloud and to minimize the overhead at the owner side, a revaluation of access control, based on attributes needs to be induced in cloud. Based on two layers of encryption we propose a new framework that addresses such requirement. Under our framework owner perform single layer as well double layer encryption. From this our system assures the confidentiality of data and preserves the privacy of users form the cloud while delegating most of the access control enforcement to the cloud.