[Cisspstudy] Help

[yogeshwaran]

Hi,
 
Kindly clarify my doubt in Cryptography - practise test
 
A symmetric algorithm must have certain characteristics to be considered strong.
which of the followin is not correct pertaining to these types of characeteristics?

A. Confusion is carried out thru' transposition and diffusion is carried out thru diffusion.
B. Confusion is carried out thru substituition and diffusion is carried out thru transposition.
C. Confusion and diffusion are both used to increase the workfactor
D. The randomness of the key and functions in the algorithm correlate with the level of confusion and diffusion that is provided.

I think the answer is A, but the practise exam says  it is B
 
Thanks & Regards,
Yogesh.M


      
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