What mode of DES is susceptible to a meet in the middle atta

What mode of DES is susceptible to a meet in the middle attack?

A. DES

B. 2DES

C. 3DES

D. 3DES EDE2

Solution

B. 2DES

2DES or double DES is no more secure than single DES and is susceptible to a meet in the middle attack.

Answers A, C, and D are incorrect because none are susceptible to a meet in the middle attack.