Abstrakt

Secure Data Sharing for Dynamic and Large Groups in the Cloud

M.R. Kalai Selvi

Cloud computing provides resources of the computing infrastructure as services over the internet as well as it provide solution for sharing group resource among group members. Unfortunately, designing a secure data sharing scheme for multi-owner groups in the cloud is not an easy task, due to the identity privacy and the frequent change of the membership. By the first efficient group signature and dynamic broadcast encryption techniques, any group member can share data with others in the cloud. The efficient first group signature scheme whose public key and signatures have length independent of the number of group members and which can therefore also be used for large groups. The computational effort for signing and verifying, independent of the number of group members. Since, the computation overhead of encryption operations and storage overhead is reduced as well as it is independent with the number of revoked user. Moreover, the storage overhead and conjointly the secret writing computation worth are reduced. Thorough analysis show that planned theme satisfies the desired security needs and guarantees efficiency as well.