Python Cyber Security - Check password strength

Last update on December 21 2024 07:25:39 (UTC/GMT +8 hours)

Write a Python program to check if a password meets the following criteria:

At least 8 characters long and

Contains at least one uppercase letter, one lowercase letter, one digit, and one special character (!, @, #, $, %, or &)

If the password meets the criteria, print a message that says "Valid Password." If it doesn't meet the criteria, print a message that says "Password does not meet requirements."

Sample Solution:

Python Code:

# Solution to Exercise 3
import re

def validate_password(password):
    # Check if the password has at least 8 characters
    if len(password) < 8:
        return False
    
    # Check if the password contains at least one uppercase letter
    if not re.search(r'[A-Z]', password):
        return False
    
    # Check if the password contains at least one lowercase letter
    if not re.search(r'[a-z]', password):
        return False
    
    # Check if the password contains at least one digit
    if not re.search(r'\d', password):
        return False
    
    # Check if the password contains at least one special character
    if not re.search(r'[!@#$%^&*(),.?":{}|<>]', password):
        return False
    
    # If all the conditions are met, the password is valid
    return True

password = input("Input your password: ")
is_valid = validate_password(password)

if is_valid:
    print("Valid Password.")
else:
    print("Password does not meet requirements.")

Sample Output:

Input your password:  Aji1#der
Valid Password.

Input your password:  A123d$%h
Valid Password. 

Input your password:  A12&ki1
Password does not meet requirements.

Input your password:  KI342$&H
Password does not meet requirements.

Flowchart:

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Generate random passwords of specified length.
Next: Generate random passwords of specified length.