OneBanc-Placement Task – MPIN Validator (Java Project)

This Java console application was developed as part of the OneBanc placement task. It validates 4-digit and 6-digit MPINs (Mobile Personal Identification Numbers) by checking for common weaknesses based on user demographics and known insecure patterns.

Features

• Supports both 4-digit and 6-digit MPINs
• Detects commonly used or easily guessable MPINs (e.g., 1234, 000000, 121212)
• It checks if MPIN matches any personal demographic data like:
  • Date of Birth (Self)
  • Spouse's Date of Birth
  • Wedding Anniversary
• Provides output:
  • Strength: STRONG or WEAK
  • If WEAK, lists reasons like:
    • COMMONLY_USED_MPIN
    • DEMOGRAPHIC_DOB_SELF
    • DEMOGRAPHIC_DOB_SPOUSE
    • DEMOGRAPHIC_ANNIVERSARY

Sample Run

• Enter your MPIN (4 or 6 digits): 181203
• Enter your Date of Birth (DDMMYYYY): 18122003
• Enter Spouse's Date of Birth (DDMMYYYY):
• Enter Wedding Anniversary (DDMMYYYY):

===== MPIN Analysis Result =====

• MPIN Strength: WEAK
• Reasons:DEMOGRAPHIC_DOB_SELF

How to Compile and Run

1. Clone the Repository

   git clone https://github.com/YOUR_USERNAME/OneBanc-Placement-Task.git
   cd OneBanc-Placement-Task
   

2. Compile Both Java Files

   javac src/mpinTask.java src/mpinValidation.java
   

3. Run the Application

   javac src/mpinTask.java src/mpinValidation.java
   

Project Structure

    OneBanc-Placement Task/
    ├── src/
    │   ├── mpinTask.java         # Main class with user input & validation
    │   └── mpinValidation.java   # Additional validation logic (if used)
    ├── README.md

Author

Ajay Tiwari B.Tech Final Year – Computer Science (Specialization in Artificial Intelligence). Passionate about Data Analytics, Java, and Secure System Design.

License

MIT License – Feel free to use, modify, and share with attribution.