How secure is your password?

A computer could try to guess your password by using 'brute force' - this means trying out lots of passwords until it guesses the right one.

Let's explore how to create secure passwords using Python, and learn about password security along the way!

Random Characters

Let's create a program to choose random characters for your password.

#!/bin/python3
import random

chars = 'abcdefghijklmnopqrstuvwxyz'
password = random.choice(chars)
print(password)

This code will generate a single random lowercase letter.

Adding Numbers and Punctuation

Let's make our passwords stronger by adding more character types:

chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!?.-'

Creating a Random Password

Now let's generate a longer password by combining multiple random characters:

password = ''
for c in range(10):
    password += random.choice(chars)
print(password)

Example output: Kb7?mN9.pQ

Choosing a Password Length

Let's allow users to specify their desired password length:

length = input('password length? ')
length = int(length)

password = ''
for c in range(length):
    password += random.choice(chars)
print(password)

password length? 15
Kj9?mN.pQ2xY5vZ

Generating Multiple Passwords

Generate multiple passwords at once:

length = int(input('password length? '))
num_passwords = int(input('number of passwords? '))

for p in range(num_passwords):
    password = ''
    for c in range(length):
        password += random.choice(chars)
    print(password)

password length? 10
number of passwords? 3
Kj9?mN.pQ2
xY5vZ8!aB4
Qw3$kL9nM7