🔐 OTP Verification System (Python)

This project is a Python-based OTP (One-Time Password) verification system designed to enhance user authentication via email. It generates a secure 6-digit OTP and sends it to the user's email address for validation. Simple, functional, and ideal for scenarios where basic email-based security is required.

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📁 Repository Structure

Got it, Nikhil! Here's a clean and informative section you can add to your README.md to explain your repository structure—tailored to showcase clarity and professionalism:

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📁 Repository Structure

This repository is neatly organized to support both presentation and implementation of the OTP Verification system:

OTP Verification System Python/
├── Presentation/
│   └── OTP Verification.pdf
│       ↪️ Project presentation highlighting objectives, workflow, code walkthrough, and test cases
│
├── Source File/
│   └── Python_Capstone_Project_iynb.ipynb
│       ↪️ Jupyter Notebook containing the full implementation of the OTP verification system
│       ↪️ Includes function definitions, email integration, verification logic, and test scenario outputs
│
├── README.md
    ↪️ Professional documentation describing project goals, structure, features, setup, and contact info

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🚀 Features

• ✅ Random 6-digit OTP generation
• 📧 Email delivery using Gmail SMTP
• 🔁 User verification with retry attempts
• ⚠️ Error handling for invalid emails and failed attempts

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🛠️ Tech Stack

• Python
• Google Colab / Jupyter Notebook
• SMTP (smtplib)
• email.mime modules

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🧩 Functions Explained

Function Name	Purpose
otp()	Generates a secure 6-digit OTP
send_otp_email()	Sends the OTP to user’s email address
verify_otp()	Prompts user to enter OTP and validates input
main()	Integrates the process and handles flow control

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🧪 Test Scenarios

• ✅ Scenario 1: Valid email and correct OTP — access granted
• ❌ Scenario 2: Invalid email — email sending fails
• 🔁 Scenario 3: Incorrect OTP entered multiple times — access denied

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🎯 Learning Outcomes

• Crafting real-time email verification logic in Python
• Implementing user input validation and flow control
• Error handling and robustness
• Use of SMTP for secure email communication

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📖 Presentation

Refer to Presentation/OTP Verification.pdf for a structured walkthrough of the system’s architecture, code highlights, and test case breakdowns.

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🤝 Acknowledgements

Built by Nikhil Karaka, Special thanks to documentation resources that supported SMTP and Python module implementation.

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📬 Contact

For queries or suggestions, feel free to reach out via email or connect on GitHub.