Table of Contents
Introduction:
With the increase of automated teller machine (ATM) fraud, new authentication mechanisms are developed to overcome security problems of personal identification numbers (PIN). Those mechanisms are usually judged on speed, security, and memorability in comparison with traditional PIN entry systems. It remains unclear, however, what appropriate values for PIN-based ATM authentication are. We conducted a field study and two smaller follow-up studies on real-world ATM use, to provide both a better understanding of PIN-based ATM authentication and how alternative authentication methods can be compared and evaluated. Our results show that there is a big influence of contextual factors on security and performance in PIN-based ATM use. Such factors include distractions, physical hindrance, trust relationships, and memorability. From these findings, we draw several implications for the design of alternative ATM authentication systems, such as resilience to distraction and social compatibility.
Block diagram explanation :
Power supply unit:
This section needs two voltages viz., +12 V & +5 V, as working voltages. Hence specially designed power supply is constructed to get regulated power supplies.
Buffers:
Buffers do not affect the logical state of a digital signal (i.e. a logic 1 input results in a logic 1 output whereas logic 0 input results in a logic 0 output). Buffers are normally used to provide extra current drive at the output but can also be used to regularize the logic present at an interface.
Drivers:
This section is used to drive the relay where the output is the complement of input which is applied to the drive but the current will be amplified.
Relays:
It is an electromagnetic device that is used to drive the load connected across the relay and the o/p of the relay can be connected to the controller or load for further processing.
Comparator:
This part reads the user card, if found valid then it processes next. This card automatically recognizes the privilege level. The heart of this card reader is the popular Operational Amplifier IC. Here every card offers some unique amount of resistance to the card reader block. Depending upon the resistance the card offers, the card reader comes to know what privilege the cardholder got.
MSP 430 Controllers:
The MSP430 is a mixed-signal microcontroller family from Texas Instruments. Built around a 16-bit CPU, the MSP430 is designed for low-cost and, specifically, low-power consumption embedded applications.
Methodology:
When we insert the ATM card in ATM, it compares in the comparator with the predefined value then it generates output fed to the MSP430, in the MSP430 checks the password if a person is authenticated then it processes next otherwise MSP430 will generate the output that is fed to buffer IC 4050, buffer stores and given to the driver IC 2003 in driver current will amplify and voltage will invert with the help of Darlington circuit of driver IC to drive the relay. Then the signal is given to the output load for indication purposes.
If anybody tries to thief ATM, breaks the continuity in the tamper circuit then it generates the output. That output is fed to buffer IC 4050, buffer stores, and given to the driver IC 2003 in driver current will amplify and voltage will invert with the help of the Darlington circuit of driver IC to drive the relay. Then the signal is given to the output load for indication purposes.
Advantages:
- More useful in remote areas.
- This project we can operate Easily
- We can avoid fraud with the help of this project.
Disadvantages:
It increases the cost whereas digital systems reduce the cost of the system.
Applications:
- This project can be implemented in Military applications.
2. Use as a surveillance device.
3. This project can be implemented Automotive domain.
