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There may be some problem in speed of the application in the service model of cloud computing with massive storage and large users. Using ECDH instead of ECC algorithms, the cloud computing data security scheme is developed. The scheme uses ECDH key exchange mechanism on their personal inputs and protecting the sharing of file in the cloud environment. ECDH algorithm comprises the characteristics of faster speed and lower calculation cost when compared to other security schemes. It supports the mass data and large users on cloud environment.