Password1! can satisfy a website’s uppercase-letter, number, and symbol rules without being a strong or uncommon password. NIST uses it to illustrate how composition rules can lead people toward predictable variations. Its current guidance for covered password verifiers takes a different approach: require sufficient length, screen the whole proposed password against a blocklist, and avoid mandatory character-class rules.
Why does Password1! pass the password rules?
A composition test checks whether a password contains specified character types. If the rule says “one uppercase letter, one number, and one symbol,” then Password1! meets those conditions. That test does not establish whether the password is rare, difficult to guess, or present in a list of commonly used or compromised passwords.
As an Amazon Associate I earn from qualifying purchases.
NIST explains the problem in Special Publication 800-63B-4, published in July 2025. Its Appendix A says: “For example, a user who might have chosen ‘password’ as their password would be relatively likely to choose ‘Password1’ if required to include an uppercase letter and a number or ‘Password1!’ if a symbol is also required.” The point is not that every person chooses that exact pattern; it is that rules can encourage foreseeable edits rather than genuinely unpredictable secrets. Read NIST SP 800-63B-4.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Does NIST require special characters in passwords?
No. NIST says covered verifiers and credential service providers (CSPs) must not require passwords to contain a mix of character types, such as uppercase letters, numbers, and symbols. A website that demands those combinations is applying its own policy, not following this part of current NIST guidance.
#1 Best Overall
- POWERFUL SECURITY KEY: The YubiKey 5 NFC is the most versatile physical passkey, protecting your digital life from phishing attacks. It ensures only you can access your accounts
- WORKS WITH 1000+ ACCOUNTS: Compatible with popular accounts like Google, Microsoft, and Apple. A single YubiKey 5 NFC secures 100+ of your favorite accounts, including email, password managers, and more
- FAST & CONVENIENT LOGIN: Plug in your YubiKey 5 NFC via USB and tap it, or tap it against your phone (NFC), to authenticate. No batteries, no internet connection, and no extra fees required
- MOST SECURE PASSKEY: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it
- PRIMARY & SPARE KEYS: Just like having a spare house key, we recommend buying two YubiKeys - one for daily use and one as a spare. That way you’ll never get locked out of your accounts
That does not mean NIST says every password is acceptable. The standard uses length requirements and whole-password blocklist screening instead. NIST guidance applies to the verifiers and CSPs within its scope; it does not mean every website has adopted these rules.
What does NIST actually recommend for passwords?
NIST SP 800-63B-4 sets different minimum lengths based on how the password is used. It also requires screening new or changed passwords against a blocklist and discourages routine expiration.
Rank #2
- FIDO2 & Passkey Ready: Business-ready and FIDO2 L1 certified. This key is supported by major management suites and is ideal for both individual and enterprise deployment. Works seamlessly with Gmail, Facebook, GitHub, Dropbox, Coinbase, and more.
- Dedicated Manager App: Use the Thetis Manager App for the initial hardware PIN setup. Setting the PIN on the device first ensures a smooth registration process. Once the PIN is configured, you can begin registering the key across your favorite FIDO2-compatible online services.
- Universal Connectivity (USB-C, USB-A, & NFC): Designed for PCs, Macs, iPhones, and Android. For mobile use, simply unfold the key, align it with your phone’s NFC antenna, and hold for a few seconds to authenticate.
- Enhanced MFA (FIDO2 & TOTP/HOTP): Strengthen your security with flexible options. Use the Manager App to access TOTP/HOTP features for accounts that do not yet support FIDO2.
- Check FIDO2 compatibility before purchase - Known limitations: ID Austria is not supported (requires FIDO2 Level 2). Windows Hello login only works with Windows Enterprise editions that support Entra ID. NFC is supported only through mobile authentication, Not MacOS/windows.
| Topic | NIST guidance |
|---|---|
| Minimum length for a password used as a single authentication factor | At least 15 characters |
| Minimum length when the password is used only as part of a multifactor authentication (MFA) process | At least 8 characters |
| Maximum length the verifier should permit | At least 64 characters |
| Character composition | Do not require character-class mixtures such as uppercase letters, digits, or symbols |
| New or changed password | Compare the whole proposed password against a blocklist of commonly used, expected, or compromised passwords |
| Periodic password changes | Do not require routine changes on a calendar schedule; require a change if there is evidence the authenticator has been compromised |
These are requirements and recommendations in NIST’s 2025 standard, not statistics about password strength or user behavior. In particular, the blocklist rule is about checking the proposed password as a whole. It does not say to reject every password containing a dictionary word or every password that includes a particular substring. NIST SP 800-63B-4 and its implementation FAQ explain the requirements and rationale.
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →How is this different from a typical composition rule?
| Question | Composition-rule approach | NIST guidance |
|---|---|---|
| What makes a password acceptable? | Often, the presence of required character types | Length requirements and a whole-password blocklist check |
| Does the minimum depend on authentication context? | Depends on the website’s policy | At least 15 characters for single-factor use; at least 8 when the password is used only as part of MFA |
| When should a password change? | Some sites may require changes on a schedule | Not routinely; require a change when there is evidence of compromise |
| What entry features help users? | May be limited by a site’s form or rules | Support long passwords and password-manager autofill, copy, and paste |
The comparison describes NIST’s guidance; it does not establish how any particular website handles passwords. A site may impose rules that differ from the standard.
Rank #3
- USB-C or tap via NFC for easy authentication on any compatible device. No drivers needed; optional Kensington software available for advanced management features.
- Works across Windows, macOS, iOS, Android, ChromeOS, and supports Passkeys and Apple ID.
- Slim, keychain-ready form for easy carry and on-the-go authentication
- IP68-rated for dependable performance
- FIDO CTAP 2.1 for enhanced security features (e.g. resident credentials, Passkey support) and backwards compatibility with CTAP 2. FIDO2 L2 certified security for phishing resistant protection against identity theft and unauthorized access.
What should you do if a site accepts Password1!?
Do not treat acceptance as a security rating. If you are choosing a password, prefer a long, unique password that you do not reuse on other accounts. A password manager can generate and retrieve distinct passwords, and NIST recommends that verifiers support password-manager autofill as well as copy and paste. Those features reduce friction when entering long secrets. NIST’s usability guidance covers these practices.
If a website forces a short password or rigid composition rules, follow its current requirements to access the account, but recognize that those rules are the site’s policy—not proof that the result is hard to guess. Do not assume you can change a site’s policy yourself.
Rank #4
- Ultra-Compact FIDO2 Security Key - Plug-and-stay or carry on a keychain. This USB-A hardware security key offers portable, always-on protection for desktop and mobile use. (Item Size: 0.75 X 0.74 IN x 0.25 IN)
- USB-A Hardware Key for All Devices - Works with USB-A ports on PC, Mac, Android, and other laptop/notebook device. Enables secure, cross-platform login with FIDO2.0 passkey support.
- FIDO Certified Security Key - Meets FIDO and FIDO2 standards. Works with Google, Microsoft, GitHub, Dropbox, and more. Please check service compatibility before purchase.
- Passwordless Login with Passkey - Supports passkey login via WebAuthn and CTAP2. Enjoy password-free sign-ins where supported. Not all websites or services currently support passkeys.
- Advanced Multi-Factor Authentication - Offers 200 FIDO2 passkey slots and 50 OATH-TOTP slots. Strong, flexible 2FA/MFA support across various apps and authentication platforms.
Do character rules or longer passwords prevent phishing?
No. A password can be long and unique yet still be phished if you enter it into a fraudulent page. NIST says passwords are not phishing-resistant. Character requirements do not change that limitation. NIST SP 800-63B-4 distinguishes password use from phishing-resistant authentication.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallQuick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
