Which of the following does not occur when sending a message ...

[B]

Which of the following does not occur when sending a message using a digital envelope?
 
  (a) The message is encrypted using a symmetric secret key.
  (b) The secret key is encrypted using public-key encryption.
  (c) A courier is used to transmit the symmetric secret keys between parties.
  (d) All of the above occur when sending a message using a digital envelope.

Question 2

Keys are made secure by choosing a(n) ________ so large that it is computationally infeasible to try all such combinations.
 
  (a) algorithm.
  (b) cipher.
  (c) key length.
  (d) key agreement protocol.

[Awesome]

Answer to Question 1

Ans: (c)

Answer to Question 2

Ans: (c)

[B]

TYSM

[at]

Gracias!