Secure Banking System – COE817 Project

Overview

This project builds a secure banking system with a server and multiple ATM clients. Users can register, log in, and perform transactions like deposits, withdrawals, and balance checks. All communication is secured using encryption and authentication protocols.

Features to Implement

✅ Core Components

• Bank Server

  • Listens for ATM client connections
  • Spawns a new thread for each client request

• User Account System

  • Register with username and password
  • Log in from ATM client

• Authenticated Key Distribution Protocol

  • Use a pre-shared key between ATM and server
  • Must:
    • Authenticate the customer to the server
    • Authenticate the server to the ATM
    • Generate a shared session key (Master Secret)

• Key Derivation

  • Derive two keys from the Master Secret:
    • Encryption key
    • MAC key (for data integrity)

• Secure Transactions

  • Support deposits, withdrawals, and balance checks
  • Encrypt all data sent between ATM and server
  • Use MACs to detect tampering
  • Record each transaction in an encrypted audit log:
    • Format: CustomerID | Action | Timestamp

• GUI Interfaces

  • Simple GUI for both ATM clients and bank server

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Demo Requirements

• Log in as a customer and perform 2–3 actions
• Verify the results in the audit log
• Repeat with another customer
• Be ready to explain your protocols to the TA

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Report Guidelines

• Length: 10–20 pages
• Font: Times New Roman, size 12

Report Sections

1. Introduction

   • Goals and scope
   • Background info

2. Design

   • Implementation overview
   • Architecture diagram and module descriptions
   • Details of:
     • Key distribution protocol
     • Key derivation
     • Security for transactions

3. Results

   • Screenshots of GUI and outputs

4. Conclusion

   • What you learned
   • Member contributions
   • Leadership experience

📌 Include the names and student IDs of all group members

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Submission

• Upload both your report and source code to the D2L submission folder
• Deadline: April 12, 2025

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Group Info

• Max group size: 4 students

Academic Honesty

• No copying or using online code
• Any plagiarism results in a zero and will be reported

🚀 How to Run

✅ 1. Start the Bank Server

Open a terminal in the root project folder and run:

cd server python server.py

✅ 2. Start the ATM Client

Open another terminal and run the following command:

cd client python atm_client.py

Then you can register a new account and login with the same credentials