One-Time PIN (OTP)

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A One-Time PIN (OTP) is a Personal Identification Number (PIN) code that is valid for only one login session or transaction using a mobile phone. There are a number of ways to deliver one-time passwords and pins with the two most common and secure ways being through proprietary tokens and mobile phones. ...

Source: https://www.infobip.com/glossary/otp-one-time-pin-code