What is the main concern with single sign-on?

A.
Maximum unauthorized access would be possible if a password is disclosed.

B.
The security administrator’s workload would increase.

C.
The users’ password would be too hard to remember.

D.
User access rights would be increased.

Explanation:
A major concern with Single Sign-On (SSO) is that if a user’s ID and password are compromised, the intruder
would have access to all the systems that the user was authorized for.
Incorrect Answers:
B: Since the security administrator would not be responsible for maintaining multiple user accounts just the one,
the security administrator’s workload would decrease and not increase.
C: Since users would only have one password to remember, it would not be hard.
D: User access rights would not be any different than if they had to log into systems manually.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 207-209