Question 1: (2 marks)
From a service perspective, what is an important difference between a symmetric-key system and a public-key system?
Note: Explain your answer in details
Question 2:
2.1. (3 marks)
Alice would like to send a message to Bob that authenticates her identity.Which of the keys would Alice best use as shown in the box on the diagram in
Figure 2.1 below.
Explain your answer.
Which key should be used to encrypt?
Alice (PA, SA, PB)
(m)
Bob (PB, SB, PA)
Figure 2.1 Alice Sending Message to Bob Using Encryption
Note: Explain your answer in details
2.2. (2 marks)
Amazon.com would like to work with its CA to set up its web site for secure eCommerce. The certificate issued by the CA to Amazon.com would be encrypted with the secret key of the CA and would include which of the following information as shown in the box on the diagram in Figure 2.2
+ 100%
Zoom
Close
