In today’s date money is an essential thing to be  carried out whether it is shopping, travelling or any health  emergencies. But, at the same time it gets annoying when  you need to carry huge amount of cash in your pockets.  This is where ATM is important. Bank has provided ATM  machines which can provide money anywhere you want.  ATM is an easy way for withdrawal of money, just need to  insert the card and enter the pin, after that the transaction  proceeds. But what if someone will keep your card and  somehow, he/she will know your password, it will grant  him/her full access to your money. That raises question on  present security and demands something new in the system  that can offer second level of security. One-time password  (OTP) is password that authenticates an authentic user for  only one login to the respective system. This paper gives  the new method towards the security of Automatic Teller  Machine (ATM) system.