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Question:
(a) What is the use of digital certificate?
(b) What is meant by a hierarchical trust model in a Public Key Infrastructure? How does the Pretty Good Privacy (PGP) model of trust differ from this? Illustrate your answer with diagrams. Why is it important that PGP certificates allow multiple signers?
(c) What do you understand by certificate revocation? Give two instances when a certificate needs to be revoked. How does the public key infrastructure handle revocation?
(d) As a web user, how can you tell if the site you are communicating with is using SSL security?
(e) Explain how the dual signature used in the Secure Electronic Transaction (SET) protocol allows privacy, that is, the merchant can see only the order information and the bank can access only the payment information.
(f) Why is the 3-D secure protocol more secure than SET?
Question: (a) A Wireless Mesh Network (WMN) is a communications network made up of radio nodes organized in a mesh topology. i. Describe the function of a TAP in WMNs. ii.
(a) Describe briefly the difference between flow control and congestion control in relation to a connection-oriented protocol such as TCP. (b) What is the initial rate of data
Question: a) How many bits per second can be sent on a noiseless 4 MHz channel if four-level digital signals are used? b) If a binary signal is sent over a 3 KHz channel who
(a) Describe DES encryption with a block diagram and brief steps. (b) How does triple DES improve security. What is the effective key length of triple DES? How can 3DES be compa
Write down the short notes on VTR. Communication between different types of the equipment and software is made possible by making use of the networks. Full-screen text editor is s
Describe what the FTAM services are. FTAM stand for the File Transfer Access and Management: FTAM is an ISO application protocol which performs the operations on files such as.
Question (a) Consider that you enter the subsequent URL in the address bar of a popular web client and that both the server and client accepts HTTP version 1.1. i. What can be
Dropbox’s tool shows how chatbots could be future of cybersecurity
Your rules should ensure that Internet access will be restricted to the following: Only the following services will be permitted as OUTBOUND traffic (to the Internet from the DM
Base lining • Organizations do not have any contact to each other • No two organizations are identical to each other • The best practices are a moving target • K
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