Which of the following is TRUE of two-factor authentication?

A.
It uses the RSA public-key signature based on integers with large prime factors.

B.
It requires two measurements of hand geometry.

C.
It does not use single sign-on technology.

D.
It relies on two independent proofs of identity.

Explanation:
There are three general factors that are used for authentication:
Something a person knows.
Something a person has.
Something a person is.
Two-factor authentication requires two of the three factors to be part of authentication process.
Incorrect Answers:
A: RSA encryption uses integers with exactly two prime factors, but the term “two-factor authentication” is not
used in that context.
B: Measuring hand geometry twice only provides one factor.
C: Single sign-on (SSO) technology allows a user to enter their credentials once to gain access to multiple
systems. Two-factor authentication could be used for SSO, not the other way around.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, pp. 162, 163, 207, 815