What Is OTP?

Passwords alone are no longer enough to stop modern attacks like phishing and credential stuffing. One-Time Passwords (OTP) add a short-lived, single-use code that significantly strengthens authentication. This guide explains what OTP is, how TOTP and HOTP work, their risks, and best practices for using OTP securely in modern authentication.
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Kundan SinghFirst published: 2025-12-15Last updated: 2025-12-15
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