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What does NIST SP 800-63B-4 say about password rules like requiring a mix of symbols, digits and capitals?

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  1. Do not impose composition rules
  2. Require one of each character type
  3. Require a special character only

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References

  1. NIST SP 800-63B-4, Digital Identity Guidelines: Authentication and Authenticator Management nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-63b-4.pdf Checked 2026-10-10.
  2. NIST SP 800-63B-4, Digital Identity Guidelines: Authentication and Authenticator Management nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-63b-4.pdf Checked 2026-10-10.
  3. NIST SP 800-63B-4, Digital Identity Guidelines: Authentication and Authenticator Management nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-63b-4.pdf Checked 2026-10-10.

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