For a cipher to be strong and avoid being broken, two elements must be a part of the encryption. Which attribute pertains to making the relationship between the key and resulting ciphertext as complex as possible?
Explanation
Answer: B - Confusion is the attribute that pertains to making the relationship between the key and resulting ciphertext as complex as possible. Confusion is commonly carried out through substitution. Each ciphertext value should depend upon several parts of the key, but this mapping between the key values and the ciphertext values should seem completely random to the observer. Diffusion, the other needed element, is carried out by using transposition, meaning that a single plaintext bit has influence over several of the ciphertext bits. Changing a plaintext value should change many ciphertext values, not just one.
