How To Create A Strong Password
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What makes a password strong — the math
Most compromised accounts aren’t the result of a sophisticated hack — they’re the result of weak passwords reused across sites. When one site leaks credentials (and several leak every year), those credentials get tried against every major service. This guide walks through what makes a password actually strong in 2026, where password managers fit, how passkeys are changing the landscape, and the five password mistakes still costing people their accounts.
The 2026 password rules (NIST-aligned)
Password strength is measured in entropy (bits). The higher the entropy, the longer a brute-force attack takes.
Passphrases vs passwords
Lesson: length beats complexity. 16 random characters is better than 10 complex characters with mixed case/symbols.
Password manager — yes, use one
Modern guidance from NIST SP 800-63B:
Two-factor / multi-factor authentication (MFA)
A passphrase is 4-6 random words: “correct horse battery staple” (xkcd-famous example). Advantages:
Passkeys — where things are heading
Password managers solve the fundamental impossibility of remembering 100+ unique strong passwords. Let the manager generate random 16-20 character passwords per site and store them.
5 password mistakes still costing people accounts
Even the strongest password is compromised if the site is breached. MFA requires a second factor — something you have (phone, hardware key) in addition to something you know (password).
Password recovery plan
Passkeys replace passwords entirely with cryptographic key pairs stored on your device (phone, laptop, hardware key). You authenticate with biometrics; the device signs a challenge.
Run the numbers
When a site offers passkey as an option, adopt it. It’s strictly more secure and more convenient than a password.