GSM Based Bank Locker Security System with 3-Layer Authentication

This paper introduces the design and development of a GSM-based banking locker security system that incorporates multilayered authentication to improve financial asset security. The system uses SIM900A GSM module to implement a threelevel security mechanism: a masked 6-digit Personal Identification Number (PIN), a one-time password (OTP) as SMS to the registered mobile number through the SIM900A GSM module with a one min lockout feature for wrong OTP input, and a final key combination of special characters for final verification. Our system uses Arduino UNO to process inputs and control along with peripherals such as a keypad, LCD, buzzer, and motor driver, for secure interaction and physical access control. Our system provides instant system feedback along with real-time alerting via the GSM Module enabling proper access authorization and intrusion detection. Test results further validate the robustness of the system against unauthorized access and its efficiency in providing multi-layer authentication. Our model offers a scalable and cost-effective solutions for the secure banking infrastructure, providing potential applications in private lockers, vaults and ATM machines