Abstract: Money is the most crucial thing to accomplish nowadays, whether you're buying something, travelling, or dealing with a medical problem. However, it is inconvenient when you need to carry a significant amount of cash in your pockets. ATMs can in useful in this situation. The bank has an ATM that can disburse cash to you wherever you are. An ATM is a simple way to make money; all you have to do is insert a card and enter a PIN, and the money is yours. But, if someone steals your card

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... you know your password, he will have complete access to your funds. This highlights the issue of present security and necessitates the search for anything new in the system that can give a second degree of protection. A one-time password (OTP) is a password that is used to verify user authentication for a single login to a system. The security of the Automatic Teller Machine (ATM) system is addressed in this research in a novel way. Keywords: OTP, ATM, PIN, security, system.