I Built a Password Strength Checker - My First Security Tool

Why I built this

Year 2 Cybersecurity, just finished TryHackMe Pre Security. I wanted a small win before jumping into IoT Lab.

Workflow I use: GitHub = code + overview, Hashnode = detailed story.

What it checks

A strong password is defined as one with length >=8, uppercase, lowercase, digit, special char. I also check common passwords.

• Length >= 8

• Uppercase (A-Z), lowercase (a-z)

• Digit (0-9)

• Special char (#?!@$%^&*-)

• Not in common list: password, 123456, qwerty

Code

Full code: github.com/donottreadmyname/small-security-projects/tree/main/01-password-checker

Key snippet:

import re
if re.search(r"[A-Z]", password):
    score += 1
if re.search(r"[#?!@$%^&*\-]", password):
    score += 1