Effective CISSP Questions

Symmetric ciphers encrypt plaintext into ciphertext using a secret key. Confusion and diffusion are two cryptographic properties of a cipher to make cryptanalysis difficult. Which of the following statements is not true?
A. Diffusion makes cryptographic attacks more difficult
B. Diffusion obscures the relationship between plaintext and ciphertext
C. Transposition algorithms and P-Box support diffusion
D. Diffusion applies to stream cipher only

Kindly be reminded that the suggested answer is for your reference only. It doesn’t matter whether you have the right or wrong answer. What really matters is your reasoning process and justifications.

My suggested answer is D. Diffusion applies to stream cipher only.

Confusion and Diffusion






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