The token generates a new password value at fixed time intervals (this password could be based on the time of day encrypted with a secret key).
B
The token generates a new non-unique password value at fixed time intervals (this password could be based on the time of day encrypted with a secret key).
C
The unique password is not entered into a system or workstation along with an owner's PIN.
D
The authentication entity in a system or workstation knows an owner's secret key and PIN, and the entity verifies that the entered password is invalid and that it was entered during the invalid time window.