<P> 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 proprietary authentication server . On 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 device , or a mobile phone or similar mobile device which runs software that is proprietary , freeware , or open - source . An example of time - synchronized OTP standard is Time - based One - time Password Algorithm ( TOTP ) . </P>
<P> 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 proprietary authentication server . On 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 device , or a mobile phone or similar mobile device which runs software that is proprietary , freeware , or open - source . An example of time - synchronized OTP standard is Time - based One - time Password Algorithm ( TOTP ) . </P>
what type of one-time password ( otp ) changes after a set time period
what type of one-time password ( otp ) changes after a set time period
time - synchronized
time - synchronized