Password strength depends primarily on length, uniqueness, and resistance to guessing. Reuse and predictable patterns create material risk even when a password contains several character types.
Recommended controls
- Length — use a long password or passphrase appropriate to the service requirements.
- Uniqueness — assign a different password to every account.
- Random generation — use a cryptographically secure generator for accounts managed through a password manager.
- Multi-factor authentication — enable an additional authentication factor where available.
Generator and storage workflow
- Generate a value with the Password Generator.
- Store the value immediately in a reputable password manager.
- Confirm that the saved entry matches the intended account and domain.
- Avoid transmission through email, chat logs, or shared notes.
Strength indicators
Password-strength indicators are estimates and do not guarantee resistance to compromise. Active passwords should not be entered into untrusted password-checking websites.
Primary reference: NIST SP 800-63B — Strength of Passwords.
Related utilities
Browser-based tools referenced in this guide