• Madhuri D. Alhat
• Prof. Sonali A. Patil,

Technology is enhancing each and every day especially in the field of Information Technology and data is very momentous elements. Due to the reasons such as the rapid growth and spread of network services, mobile devices, and online users on the Internet leading to a remarkable increase in the amount of data. Almost every industry is trying to cope with this huge data. Big data phenomenon has begun to gain importance. However, it is not only very difficult to store big data and analyze them with traditional applications, but also it has challenging privacy and security problems. So we proposed system will classify the files in two main categories i.e. hot files and Cold files. To avoid bottleneck at server end the replicas of hot file will created and stored on different servers. This accession is drafted to magnify privacy protection scope within liquidate time constraints. Proposed approach aims to selectively encrypt data and use privacy classification methods under timing constraints.

Big Data Storage; Access Control; the NTRU Cryptosystem; Secret Sharing; Access Policy Update; Cloud Computing.

"“ACHIEVING PRIVACY OF BIG DATA IN MOBILE CLOUD USING DYNAMIC DATA ENCRYPTION STRATEGY (D2ES)”", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.558-562, January-2019, Available :http://www.jetir.org/papers/JETIR1901672.pdf

"“ACHIEVING PRIVACY OF BIG DATA IN MOBILE CLOUD USING DYNAMIC DATA ENCRYPTION STRATEGY (D2ES)”", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp558-562, January-2019, Available at : http://www.jetir.org/papers/JETIR1901672.pdf