What is an OTP code and how does it work?

OTP stands for “One-Time Password.” It’s a security feature used for authentication purposes, especially in online services. The purpose of an OTP is to add an extra layer of security on top of traditional username and password authentication.

Here’s how it works:

• Request for OTP: When you attempt to log in to a service that requires OTP authentication, you provide your username.
• Generation: The service then generates a unique, temporary password (the OTP) and sends it to your registered email address.
• Delivery: OTPs are generated through email.
• Verification: Enter the OTP code received; in the requested device; within a specified time limit (usually a few minutes).
• Validation: The service verifies the OTP you entered against the one it generated. If they match, you’re granted access. If not, you may be given a limited number of attempts to try again, or you may need to request a new OTP.
• Expiration: OTPs are valid for a short period of time (usually a few minutes) and can only be used once. After the specified time limit expires or after a successful login, the OTP becomes invalid.

OTP authentication adds an extra layer of security because even if someone manages to obtain your username and password, they will also need to access your mobile device or email inbox to successfully log in, making it significantly harder for unauthorized individuals to gain access to your accounts.