Editing One-time password (section)

=== Time-synchronized ===

A time-synchronized OTP is usually related to a piece of hardware called a [[security token]] (e.g., each user is given a personal token that generates a one-time password). It might look like a small calculator or a keychain charm, with an LCD that shows a number that changes occasionally. Inside the token is an accurate clock that has been synchronized with the clock on the authentication [[Server (computing)|server]]. In these OTP systems, time is an important part of the password algorithm, since the generation of new passwords is based on the current time rather than, or in addition to, the previous password or a [[secret key]]. This token may be a [[Proprietary hardware|proprietary]] device, or a [[mobile phone]] or similar [[mobile device]] which runs [[software]] that is proprietary, [[freeware]], or [[open-source license|open-source]]. An example of a time-synchronized OTP standard is [[time-based one-time password]] (TOTP). Some applications can be used to keep time-synchronized OTP, like [[Google Authenticator]] or a [[password manager]].