Which type of password token involves time synchronization?

A.
Static password tokens

B.
Synchronous dynamic password tokens

C.
Asynchronous dynamic password tokens

D.
Challenge-response tokens

Explanation:
Synchronous dynamic tokens make use of time or counters to synchronize a displayed token code with the
code expected by the authentication server. Hence, the codes are synchronized.
Incorrect Answers:
A: Static passwords are reusable passwords that may or may not expire, and are normally user generated.
C: Asynchronous dynamic tokens are not synchronized with a central server.
D: Challenge-response tokens are asynchronous dynamic password tokens.

Conrad, Eric, Seth Misenar, Joshua Feldman, CISSP Study Guide, 2nd Edition, Syngress, Waltham, 2012, pp.
30-36