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In 21st century technological word now has bring a tremendous change to health care system is widely used by doctor patients and researchers. Patients use wearable device such as smart eyewear, foot wear, smart watches, which is use by both patient to wear and by doctor to monitor patient condition remotely on cloud. This provides time savage fastest treatment facility but as this data is huge in amount it’s very important to take care of security and privacy of the big data on cloud. Because the big data is not between patient and doctor it’s on cloud were several third parties like service providers and other unauthorized user are also present and they can easily fetch patient’s personal information for their own benefit. In this paper a novel approach based on advance encryption method and watermarking technique is presented to provide protection and security to e health data on cloud.