A One-Time Password (OTP) is used to authenticate users accessing their accounts. Common OTP methods are email, text messages, authentication applications, or a physical token device. The purpose of OTPs is to provide an extra layer of security on top of the normal username and password. The main benefit of this authentication method is that the OTP expires after a certain period and can only be used once. The most common use case for one-time passwords is two-factor authentication, which is used in addition to a user’s login credentials. For example, Google Authenticator generates codes that must be entered into a website in addition to a user’s username and password. This code is generated via an algorithm and changes in intervals, usually around 60 seconds. The benefit is that users do not need to remember the code since it is different every time they sign into the resource. OTP is used extensively in organizations to prevent unauthorized access to accounts. Its main advantage is that it provides additional security measures beyond just one form of identification alone. It is also useful when users change their passwords frequently due to forgetfulness. For example, if a user forgets their password, they can use the OTP feature to reset it without remembering the old one. In addition, OTPs are more secure than traditional passwords because they cannot be easily guessed.