SMS · token · verify · phone · app · backup · secure · identity · access · confirm · OTP · PIN · biometric · fingerprint · authenticator · prompt · trust · device
IDEA.org / Words / two-step verification
Related — authentication (Confirming genuine identity); password (Authentication string); security (Protection from threat); login · code · SMS · token · verify · phone · app · backup · secure · identity
security leveltwo-step verification ≠ open access Free public scholarly content; guest access · public access · auto-login · single sign-on
access frictiontwo-step verification ≠ instant access Reaching something without delay
email: inbox, from, send, to, outbox; messaging: message, text, chat, send, reply
Word data: Linguabase (CC0) · www.idea.org/words/two-step_verification