PassMeter

A Julia tool to measure password strength using combinatorics and entropy.

🔐 Password Strength Analyzer

A lightweight, high-performance CLI tool written in Julia to evaluate password strength using Combinatorics and Information Theory.

Perfect for cybersecurity enthusiasts who want to understand the math behind brute-force attacks.

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✨ Features

• Character Set Analysis: Detects uppercase, lowercase, digits, and special symbols.
• Brute-Force Time Estimation: Calculates the exact time required to crack the password (assuming 10 billion guesses/second).
• Strength Classification: Automatically categorizes passwords into:
  • Very Weak
  • Weak
  • Moderate
  • Strong
  • Very Strong
• Pure Julia: Leverages Julia's speed for heavy mathematical computations.

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🧮 The Math Behind It

The total number of possible combinations for a password is calculated as:

$$TotalCombinations = (CharacterSetSize)^{Length}$$

Where CharacterSetSize depends on the types of characters used:

• Lowercase letters (a-z): 26
• Uppercase letters (A-Z): 26
• Digits (0-9): 10
• Special characters (!@#$...): 32

The estimated cracking time is:

$$TimeToCrack = TotalCombinations / GuessesPerSecond$$

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🚀 Getting Started

Prerequisites

• Julia (v1.6 or higher)

Installation

1. Clone the repository (or just download the file):

git clone https://github.com/Arad883/PassMeter.git

Usage

Simply call the function with your password:

password_strength("your_password_here")

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📊 Example Output

Input:

password_strength("1234")

Output:

Dict{String, Any} with 4 entries:
  "seconds_to_crack"   => 1.0e-6  # (0.000001 seconds)
  "strength"           => "Very Weak"
  "char_set_size"      => 10
  "total_combinations" => 10000

Input:

password_strength("Aa1!@#$%")

Output (Will be significantly stronger):

Dict{String, Any} with 4 entries:
  "seconds_to_crack"   => 2.8e7  # (approx. 324 days)
  "strength"           => "Strong"
  "char_set_size"      => 94
  "total_combinations" => 2.8e17

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📜 License

MIT License - Feel free to use, modify, and distribute.

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👨‍💻 Author

Arad - Cybersecurity Developer | Julia & Python Enthusiast

"In the world of zeros and ones, math is the ultimate firewall."