Question: compared to the real DES ( Data Encryption Standard ) , how does S - DES differ in terms of complexity? Select one: a .

compared to the real DES (Data Encryption Standard), how does S-DES differ in terms of complexity?
Select one:
a. It is a simplified version with fewer rounds and shorter key length
b. It relies on different mathematical principles altogether
c. It uses a larger key size, making it significantly more secure
d. It employs more complex substitution and permutation operations

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