Secured Mechanism for Dynamic Key Generation in ATM System

Abstract

Automatic Teller Machines (ATMs) are used by millions of customers every day to make cash withdrawals from their accounts. However, the wide deployment and sometimes-secluded locations of ATMs make them ideal tools for criminals to turn traceable electronic money into clean cash. Existing ATMs do not have much security. There is only one security level provided in existing system that is password. Hackers can easily hack the password, and if intruder has the ATM card then he can easily access the money from ATM system. To prevent this we proposed secured mechanism for the ATM systems in this paper. First level security is the password. When the password is entered successfully next step is to generate four bit secured dynamic key (SDK) (i.e. a dynamic key generated using secured mechanism). The SDK is generated using efficient random selection algorithm and efficient encryption and decryption technique. This generated key is sent through GSM modem kit as an SMS to the customer who is presently using the ATM System to. This 4 bit SDK is authenticated as the access code to provide secured higher level security. The proposed work involves the implementation of the SDK generation mechanism. Further, using this implementation, we conducted experiments to study and compare the response times to send the dynamic key to the customer belonging to two different service providers.