Which of the Following Statements About Symmetric Key Encryption Is

Multiple Choice

Which of the following statements about symmetric key encryption is not true?

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.