Author Question: The Data Encryption Standard uses a(n) ________-bit key. A) 8 B) 56 C) 256 D) ... (Read 40 times)

PhilipSeeMore · **on:** Jul 7, 2018

The Data Encryption Standard uses a(n) ________-bit key.

A) 8
B) 56
C) 256
D) 512

Question 2

All the following statements about symmetric key cryptography are true except:

A) in symmetric key cryptography, both the sender and the receiver use the same key to encrypt and decrypt a message.
B) the Data Encryption Standard is a symmetric key encryption system.
C) symmetric key cryptography is computationally slower.
D) symmetric key cryptography is a key element in digital envelopes.