The World Today Is Moving to Digitization, It Leads to Exponential Increase and Growth of Data. Cloud Based Services Use De-Duplication Technique to Remove Duplicate Copies of Data. Deduplication Technique Is Useful For Clients of Public Cloud to Decrease Storage Space and Network Bandwidth Consumption. a New Client Side De-Duplication System Is Proposed to Securely Store Data In Public Cloud and Only Unique Copies of Contents Are Stored In a Cloud Database. to Protect the Privacy of Contents While Providing Support to De-Duplication, a Convergent Encryption and Merkle-Based Tree Concepts Are Used. the Authorized Users Can Download the File from Cloud Storage and Secure Search on Encrypted Data Is Provided.