Scalable and secure data sharing for dynamic groups in cloud

Cloud computing plays an important role in data sharing or transfer of information from one place to another. The services provided by the cloud are greatly enjoyed by the user. The storage of the user´s data in the cloud provides the high standard of qualities and more enjoyable services to the users. The services provided to the users are the payment depends on your services used in the cloud. The cloud computing data centre shares many performances to the user in efficient way such performances as utilizes the opportunity at right time, waiting time, perfect responsiveness to the cloud user, quickly availability and efficiency in storage capacity. Sharing group resource among cloud users is a major problem, so cloud computing provides an economical and efficient solution. Due to frequent change of membership, sharing data in a multi-owner manner to an untrusted cloud is still a challenging issue. In this paper, we propose a secure multi-owner data sharing scheme, for dynamic group in the cloud. By providing group signature and dynamic broadcast encryption techniques, any cloud user can securely share data with others. Meanwhile, the storage overhead and encryption computation cost of the scheme are independent with the number of revoked users. In addition, we analyze the security of this scheme with rigorous proofs. One-Time Password is one of the easiest and most popular forms of authentication that can be used for securing access to accounts. One-Time Passwords are often referred to as secure and stronger forms of authentication, and allowing them to install across multiple machines. We provide a multiple levels of security to share data among multi-owner manner. Our model gives the full efficient work when compared to the previous system is shown through our simulation and implementation analysis.