Symmetric key algorithm uses same key for both encryption and decryption. The authors take a centralized approach where a single Key Distribution Center (KDC) distributes secret keys and attributes to all users. A new decentralized access control scheme for secure data storage in clouds that supports anonymous authentication. The validity of the user who stores the data is also verified. The proposed scheme is to hide the user's attributes using SHA algorithm. The Pailier cryptosystem is a probabilistic asymmetric algorithm for public key cryptography.