Which of the following is the WEAKEST authentication mechanism?

A.
Passphrases

B.
Passwords

C.
One-time passwords

D.
Token devices

Explanation:
Passwords are considered one of the weakest security mechanisms available, because users generally select
passwords that are easy to guess.Incorrect Answers:
A: Because a passphrase is longer, it is said to be more secure than a password.
C: Once a one-time password is used, it is no longer valid. It is, therefore, more secure than a normal
password.
D: Token devices generate a One-time password, which is more secure than a normal password.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 192, 196, 197, 199