Which of the following statements pertaining to key management is NOT true?

A.
The more a key is used, the shorter its lifetime should be.

B.
When not using the full keyspace, the key should be extremely random.

C.
Keys should be backed up or escrowed in case of emergencies.

D.
A key’s lifetime should correspond with the sensitivity of the data it is protecting.

Explanation:
The rules for keys and key management advise that the keys must be extremely random. It also states that the
algorithm must make use of the full spectrum of the keyspace.
Incorrect Answers:
A, C, D: These options are included in the rules for keys and key management.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 842