Which of the following is NOT a disadvantage of symmetric cryptography when compared with asymmetric
ciphers?

A.
Provides Limited security services

B.
Has no built in Key distribution

C.
Speed

D.
Large number of keys are needed

Explanation:
Symmetric cryptography is much faster than asymmetric systems, and is difficult to crack if a large key size is
used.
Incorrect Answers:
A, B, D: Symmetric cryptography provides confidentiality, but not authenticity or nonrepudiation, and therefore
deemed limited. It requires a secure mechanism to deliver keys correctly. Each pair of users needs a unique
key. Therefore, as the number of individuals increase, so does the number of keys.
These are all considered weaknesses of symmetric cryptography.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 783