LESSON 4

Password Security

Learning objective: Create and manage strong, unique passwords.

Understand

Passwords are still the front door to most accounts.

Strong passwords are long, unique per account, and random. Reusing passwords means one breach unlocks many accounts. A password manager generates and stores unique passwords so you do not have to remember them.

Analogy: Reusing one password is like using the same key for your house, car, and office — lose it once and everything is exposed.

See It in Action

Weak versus strong choices:

Weak:   password123
Strong: a long, random, unique passphrase per site
How it works: Length and uniqueness matter more than adding a single symbol to a common word.

Try It Yourself

  1. Try a password manager.
  2. Replace one reused password with a unique one.
  3. Check if any accounts share a password.

Quick Quiz

Why is reusing passwords dangerous?

Challenge

Set up a password manager and create one strong, unique password with it.

Success condition: You have at least one long, unique password stored securely.