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AhaBulb: Stuff Everyone Should Know · ahabulb.com/tech-mfa-distinct-factors

What makes authentication truly multi-factor?

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  1. A password plus a security question
  2. Two distinct authentication factors
  3. One password entered twice

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References

  1. NIST SP 800-63B Authentication Assurance Levels pages.nist.gov/800-63-4/sp800-63b/aal Checked 2026-10-10.

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