Cloud computing is flexible, on-demand and low-cost uses of computing resources so that rapid developments occurring in cloud computing and services. There has been a growing trend to use the cloud for large-scale data storage. This has raised the important security issue of how to control and prevent unauthorized access to data stored in the cloud. New decentralized access control scheme was proposed for secure data storage in cloud which uses attribute based encryption. In the proposed scheme the authenticity of users has anonymously done by trustee before the data stores on clouds. Also proposed scheme has provided features that only authorized users are able to decrypt stored data. The cloud in proposed scheme used only to store information which reduce computation and storage overhead than previous scheme.
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