Glossary: MFA, Access Control and Passwords
OTP (One-time Password)
Also written: one-time password, OTPs
A code, usually six digits, that works for one login only. The two standard ways to make one are HOTP and TOTP, and no OTP is phishing-resistant.
Where the book teaches it
Related terms
HOTP (HMAC-based One-time Password)TOTP (Time-based One-time Password)shared secret