How to Create a Strong Password You'll Actually Remember

Most password advice focuses on complexity rules — one uppercase, one number, one symbol — but those rules don't actually predict how hard a password is to crack. Length and randomness do far more work than a swapped '3' for an 'e'.

Why length beats complexity

A password's strength against brute-force guessing comes down to how many possible combinations an attacker has to try. Adding characters multiplies that number far faster than adding character *types*. A random 16-character password with only lowercase letters is harder to crack than an 8-character password crammed with symbols — because length grows the search space exponentially, while extra character types only grow it linearly.

What actually makes a password weak

• Reusing the same password across multiple sites — one leaked site compromises all of them.
• Predictable substitutions like 'P@ssw0rd' — password-cracking tools already account for these.
• Anything based on public information: your name, birth year, pet's name, city.
• Short passwords, even with symbols — under 10 characters is crackable quickly with modern hardware.

A practical system: generate, don't memorize everything

1. Use a random password generator to create a long (16+ character), unique password for every important account — banking, email, and anything tied to password resets for other accounts.
2. Store them in a password manager rather than memorizing each one — this is the single biggest security upgrade most people can make.
3. For the handful of passwords you truly must remember (your device lock, your password manager's master password), use a passphrase — four or five random unrelated words are longer and easier to recall than a short scrambled string, and just as strong.
4. Turn on two-factor authentication wherever it's offered — it protects you even if a password does leak.

Checking and hashing passwords

If you're a developer storing user passwords, never store them in plain text — always hash them with a purpose-built algorithm (bcrypt, Argon2, or scrypt), not a general-purpose hash like plain SHA-256. A general hash generator is useful for checksums and data integrity checks, not for password storage, since it's designed to be fast — the opposite of what you want when hashing passwords.