What is OTP? Explain it?
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A one-time password, also known as one-time pin, is a password that is valid for only one login session or transaction, on a computer system or other digital device. ... The most important advantage that is addressed by OTPs is that, in contrast to static passwords, they are not vulnerable to replay attacks.
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A one-time password (OTP), also known as one-time pin, is a password that is valid for only one login session or transaction, on a computer system or other digital device. OTPs avoid a number of shortcomings that are associated with traditional (static) password-based authentication; a number of implementations also incorporate two factor authentication by ensuring that the one-time password requires access to something a person has (such as a small keyring fob device with the OTP calculator built into it, or a smartcard or specific cellphone) as well as something a person knows (such as a PIN).
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