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Abstract: Online banks may disclose consumer’s shopping preferences due to various attacks. This project mainly focused on online consumption protection. Also this project describes how a customer can purchase products using their Fingerprint Authentication Algorithm. Only when the fingerprint is matched then the customers can able to purchase the products. An Optimized Differential private online transaction scheme (O-DIOR) is used for online banks to set boundaries of consumption amounts with added noises. Moreover, it provide in-depth theoretical analysis to prove that O-DIOR Scheme satisfy the differential privacy constraint. It helps to provide improved security for Online Shopping. Fingerprint Authentication Algorithm has been used for Finger print Verification.