All the Following Statements About Symmetric Key Encryption Are True

Multiple Choice

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

A) In symmetric key encryption, 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 encryption is computationally slower.
D) Symmetric key encryption is a key element in digital envelopes.