Substitution, Transposition, and Re-Encryption are the guiding principles for bo

Question

Substitution, Transposition, and Re-Encryption are the guiding principles for both DES and AES

Mark the correct answer below:
a) agree.
b) True for substitution and transposition; re-encryption is only found in triple-DES, none in AES.
c) No! The guiding principles for both DES and AES is that substitution is more robust than transposition, and re-encryption is only for purposes of redundancy.
d) No. AES does not make use of substitution as a cryptographic means, only for purpose of steganography.

Explanation / Answer

Option c is correct choice.

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