• Mr. Gopal R. Chandangole
• Mr. Aniruddha P. Kshirsagar

Cloud computing is nothing but delivering applications as services over internet and these services are provided by combination of hardware’s and software’s of data center’s and these services as Saas, Paas, Iaas etc. cloud computing commonly describe as converting capital expenses into operating expenses (CapEx to OpEx. Cloud computing provide ability to store data in cloud and share that valuable data to multiple authorized users. It also provides economical and efficient solution for sharing group resources among multiple cloud users. Sharing data among multiple users’ lights on defensive of data and identity privacy of users from untrusted cloud is still challenging problem. Encrypting documents with different keys using public key cryptosystem such as Attribute based encryption (ABE) and Proxy re-encryption has some weaknesses. It can’t efficiently handles adding or revoking users or identity attributes. In this paper we proposed a secure, efficient data sharing scheme for dynamic groups in cloud with anonymous authentication of cloud users. By combining group signatures and dynamic broad encryption technique, any cloud user will anonymously share data with other users efficiently. There are some issues regarding storage overhead and encryption computation costs are overcome here.

Clouding Computing, Data Sharing, Privacy Preserving, Access Control, Dynamic Groups

"Anonymous and Traceable Secure Group Data Sharing Scheme in Cloud Computing", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 3, page no.408-417, March-2020, Available :http://www.jetir.org/papers/JETIR2003064.pdf

"Anonymous and Traceable Secure Group Data Sharing Scheme in Cloud Computing", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 3, page no. pp408-417, March-2020, Available at : http://www.jetir.org/papers/JETIR2003064.pdf