🔐 Password Vault Manager

A simple GUI-based password vault that securely stores passwords, checks their strength, and prevents password reuse. It uses AES encryption to store passwords safely in a vault file.

📌 Features

• Secure Password Storage using AES encryption
• Password Strength Analysis (checks length, complexity, and common patterns)
• Password Reuse Detection
• Master Password Authentication
• Load and Save Password Vault

📂 Project Structure

📦 PasswordVaultManager
 ┣ 📜 Main.java                  # Entry point for the application
 ┣ 📜 PasswordAnalyzer.java       # Password strength & reuse checker
 ┣ 📜 PasswordEntry.java          # Password storage object
 ┣ 📜 PasswordManager.java        # Manages password list and storage
 ┣ 📜 PasswordVaultGUI.java       # GUI interface
 ┣ 📜 VaultSerializer.java        # Encryption & file handling
 ┗ 📜 README.md                   # Project documentation

🚀 How to Run the Project

1️⃣ Compile the Project

Run the following command in the terminal:

javac Main.java PasswordAnalyzer.java PasswordEntry.java PasswordManager.java PasswordVaultGUI.java VaultSerializer.java

2️⃣ Run the Application

java Main

🔑 Usage Guide

1. Enter the Master Password
   • Default: defaultMasterPassword
2. Use the GUI to Add New Passwords
   • Click "Add Password"
   • Enter Site, Username, and Password
   • The system will analyze password strength automatically.
3. Save or Load Vault
   • Use the "File" menu to save/load passwords securely.

🔒 Security Details

• AES Encryption (128-bit)
  • Encrypts stored passwords before saving them to vault.ser
• Automatic Password Strength Check
  • Scores passwords 0-10 (Weak, Moderate, Strong)
  • Flags common & weak passwords (e.g., "password123")
• Prevents Password Reuse
  • Warns if the password was used before

🛠 Future Improvements

✔ Enhance password strength scoring
✔ Support hashed master passwords
✔ Add password visibility toggle
✔ Store vault in a database instead of a file