A key schedule is:
A.
A set of subkeys derived from a secret key
B.
A method of generating keys by the use of random numbers
C.
Using distributed computing resources to conduct a brute force attack on a symmetric algorithm
D.
A list of cryptographic keys to be used at specified dates and times
Explanation:
The subkeys are typically used in iterated block ciphers. In this type of cipher, the plaintext is broken
into fixed-length blocks and enciphered in rounds. In a round, the same transformation is applied
using one of the subkeys of the key schedule.