What Is a One-Time Password and How It Works
A one-time password (OTP) is a temporary code used once to verify identity and protect online accounts. What OTP
A one-time password (OTP) is a temporary code used once to verify identity and protect online accounts.
What OTP Means
An OTP is a numeric or alphanumeric code sent to a user while logging in or making a sensitive action.
How OTP Protects Accounts
Each OTP expires quickly and cannot be reused. This blocks attackers who try to guess passwords or steal login data.
OTP Delivery Methods
OTPs are sent through:
- SMS
- Authenticator apps
- Push notifications
Each method confirms the user has access to a device they own.
Steps in OTP Verification
A user enters their username and normal password. The system then sends an OTP. The user types the OTP to finish login.
Time Limits
Most OTPs expire within 30–60 seconds. Time limits ensure even stolen codes are useless.
Use in Banking and Payments
Banks use OTPs for money transfers, withdrawals, and card payments. This reduces fraud by requiring real-time identity proof.
Why OTPs Are Trusted
OTPs work because they provide a second layer of authentication beyond the usual password.
