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What does the key length represent?
A. Hash block size
B. Cipher block size
C. Number of permutations
D. Other
Correct Answer: C
Explanation/Reference:
In cryptography, an algorithm’s key space refers to the set of all possible permutations of a keys. If a key were eight bits (one byte) long, the keyspace would consist of 28 or 256 possible keys. Advanced Encryption Standard (AES) can use a symmetric key of 256 bits, resulting in a key space containing 2256 (or 1.1579 × 1077) possible keys. https://en.wikipedia.org/wiki/Key_space_(cryptography)
