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In Modern Communication Systems, Secure Key Generation And Management Play A Crucial Role In Protecting Data Against Unauthorized Access And Cyberattacks. Many-to-one Networks, Where Multiple Users Or Devices Communicate With A Single Central Node, Face Unique Challenges In Ensuring Confidentiality, Integrity, And Authentication Of Transmitted Data. This Work Proposes A Secure Secret-key Generation And Verification Framework Designed For Many-to-one Network Environments. The System Enables Each User To Generate A Unique Secret Key That Is Securely Shared With The Central Node. These Keys Are Then Used For Encrypting Messages At The Sender’s Side And Decrypting Them At The Receiver’s Side, Ensuring End-to-end Confidentiality. A Verification Mechanism Is Integrated To Authenticate The Key Before Decryption, Preventing Replay Attacks, Man-in-the-middle Intrusions, And Unauthorized Access. By Combining Symmetric Encryption With A Robust Verification Process, The Proposed Model Enhances Both The Efficiency And Security Of Communication In Many-to-one Networks, Making It Suitable For Applications Such As Cloud Computing, IoT Systems, And Secure Data Aggregation.