https://github.com/yashbhansali951/password-strength-checker

A Python-based password strength checker and breach verifier with strong password suggestions using the HaveIBeenPwned API.
https://github.com/yashbhansali951/password-strength-checker

api-integration beginner-friendly cybersecurity haveibeenpwned information-security password projects python security-tools

Last synced: 4 months ago
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A Python-based password strength checker and breach verifier with strong password suggestions using the HaveIBeenPwned API.

• Host: GitHub
• URL: https://github.com/yashbhansali951/password-strength-checker
• Owner: yashbhansali951
• Created: 2025-04-28T11:21:56.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2025-04-28T12:06:09.000Z (6 months ago)
• Last Synced: 2025-04-29T22:38:28.486Z (6 months ago)
• Topics: api-integration, beginner-friendly, cybersecurity, haveibeenpwned, information-security, password, projects, python, security-tools
• Language: Python
• Homepage:
• Size: 13.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# Password Strength Checker 🔒

A Python-based tool to evaluate password strength based on structure, entropy, and exposure to known breaches using the HaveIBeenPwned API.

![Python](https://img.shields.io/badge/Python-3.9%2B-blue?logo=python&logoColor=white)

![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)

![Status](https://img.shields.io/badge/status-active-brightgreen)

---

## Features

- ✅ Checks password length and complexity (uppercase, lowercase, digits, symbols).

- ✅ Rates password as **Strong**, **Moderate**, or **Weak**.

- ✅ Calculates password **entropy** (security strength in bits).

- ✅ Verifies if the password has been leaked in known data breaches.

- ✅ Provides detailed feedback on missing elements.

- ✅ Suggests strong, random passwords if the entered password is weak.

---

## How it Works

- The password is evaluated for:

  - Minimum length (8 characters).

  - Presence of uppercase, lowercase, digits, and special characters.

- Password is **hashed with SHA-1** and checked against the [Pwned Passwords API](https://haveibeenpwned.com/API/v3#PwnedPasswords).

- Displays whether your password is **safe** or has been **compromised**.

  

---

## Installation

1. Clone the repository:

    ```bash

    git clone https://github.com/yourusername/password-strength-checker.git

    ```

2. Navigate to the project directory:

    ```bash

    cd password-strength-checker

    ```

3. Install the required Python libraries:

    ```bash

    pip install requests

    ```

---

## Usage

Run the script:

```bash

python password_checker.py

Would you like a strong password suggestion? (yes/no): yes

Here is a suggested strong password: Xr9@eL!2v#Pt

---

## Output

Enter a password to check: Example@123

Password is strong.

✅ Password not found. Good to go!

Password entropy: 75.56 bits.

Would you like a strong password suggestion? (yes/no): yes

Suggested password: u8Q!z2#TqBv$wP1M