NIST 800-63-4 provides Identity Assurance Levels (IALs), which measure how confident we are that a claimed digital identity matches an actual one in real life. In addition, it outlines requirements for credential service providers (CSPs), verifiers and relying parties.
Email OTP and SMS-based authentication have been deprecated in favor of more secure phishing-resistant Authenticators such as...
English
Arabic
Spanish
Portuguese
Deutsch
Turkish
Dutch
Italiano
Russian
Romaian
Portuguese (Brazil)
Greek