Paper Details

As the current world become digital, therefore large amount of digital data needs to handle. For handlinglarge amount of data there is need of cloud, as cloud provides large amount of storage and computing capacity. Publiccloud is very efficient but security is major problem. Security issue can be solved by using mediated certificateless publickey encryption (mCL-PKE). Public cloud involves mainly Key escrow problem and certificate revocation problem, bothproblems are solved by the mCL-PKE plan. The mCL-PKE scheme can be use for secure data sharing and it does not usepairing operation. Current schemes are expensive due to pairing and require maintaining certificate, which requiresmore memory and there is chances of attacks. In the mCL-PKE cloud act as key generation centre, generates respectivepublic keys. Data owner encrypts the data using cloud generated public key and cloud then partially decrypts data. Thenuser fully decrypts data. This scheme fully secures the data from third party as cloud also not able to reveal theinformation. In mCL-PKE scheme fine grained data access control achieved by addition of new thing. In this data ownerdivides user in the form of group and single key to each user group. This reduces number of keys required to maintain,produced as well as data confidentiality is achieved.

Vinayak Bhau Bharekar, Swapnil Ramdas Mahajan, Mahesh Madhav Kulkarni, Ajinkya Nanaso Dhurgude, Prof.Mrs.Sarika Pabalkar, “SECURE DATA SHARING IN PUBLIC CLOUD”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 2, Issue 12, pp. 464-468, December 2015.