OTP Authentication Tokens

A one-time password (OTP) is a randomly generated code made up of numbers or letters that verifies a user for just one transaction or login. It’s a lot safer than a regular password, especially those created by users, which can often be weak and used on several accounts.

Authentication with a one-time password (OTP) is a security technique that confirms a user’s identity during online activities. Usually paired with another method, like a password, it serves as a type of two-factor authentication (2FA).

A one-time password (OTP) is a temporary password used for a single login session or transaction on digital devices. It goes by various names like one-time PIN or dynamic password and helps overcome the limitations of traditional static passwords. Many OTP systems also use two-factor authentication, requiring something the user has, like a key fob or smartphone, along with something they know, like a PIN.
To create OTPs, algorithms rely on randomness and cryptographic hash functions, making it tough for attackers to predict future passwords based on previous ones. While OTPs are seen as a potential upgrade to standard passwords, they do have vulnerabilities; they can be intercepted, and physical tokens can be lost or stolen. Additionally, if not implemented securely, systems can still fall prey to phishing attacks, allowing unauthorized users to gain access.