People are using lot of cloud storage service (CSs) to store documents. The cloud storage services are used to conserve people personal data and facilitate data transferable. The computer which connected via internet is adequate to access the data anywhere without carrying any physical drives like Pen drive, CD, etc. In existing techniques like, CSs providers are using 256-bit Advanced Encryption Standard (AES) and 128-bit (AES) encryption algorithm. This is one of the best techniques to secure data, but once the intruder gets encrypted data, there is possibility for data insecurity by means of applying brute force attacking technique in future increasing the speed performance of computer. The objective of this paper to analysis cryptographic algorithm which perfume on various data formats and data security attacks and threads in cloud storage environment. The aim to overcome this kind of attacks and key tampering technique, the key generation and maintain process handover to user’s itself. It makes cloud storage service provider to maintain data only, with high efficient encryption technique that provides strong protection for data.