Secure sharing with cryptography in cloud computing

Cloud computing is buzz word now days. Cloud providers try to provide security, sharing, authenticity and integrity. Under this research work, we have focused on adding new functionality for cloud providers that is secure sharing. In public cloud anyone can see data of any user but in private cloud data is secured and limited to particular user. This research work proposes framework that allow generating a key for particular users with particular permissions. Cloud user can generate keys for different users with different permissions to access their files. This framework uses cryptography algorithms like AES and RSA. AES is most secure algorithm in cryptography. Once key is generated user (user who have generated a key for their own files) can provide that key to decided user (user for whom key is generated). So when decided user will try to access files on cloud with that key, permission decided by owner will be given to that user. This is partial access to user and more secure then providing password to user. Cloud service providers can also add concept of defining files also like cloud user can generate key for particular file, particular user and particular permission. Those keys then can be provided to different users.