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Question:
(a) What do you meant by the term diffusion and confusion? Explain how diffusion and confusion can be implemented.
(b) Distinguish between authorisation and authentication.
(c) The Access Control Matrix is not implemented in practice. Why? How is it implemented.
(d) Explain the principle of complete mediation and principle of least privilege.
(e) What do you meant by the term "Timely revocation of trust"? Give example of a where it might be used.
(f) People normally tend to write their password down. Explain a mechanism that will be used to prevent people snooping around to get the written password.
(g) Password transmitted on the network will be captured and re-used by an attacker. Describe how the server can detect that a password has been captured and is being used by an attacker and not by the legitimate user.
(h) Give reasons why biometrics is not as popular as password based systems.
Question: (a) Explain and illustrate with a drawing the three-layer feedforward multilayer perceptron neural network. (b) Summarize the standard backpropagation algorithm in
ADDRESS RESOLUTION PROTOCOL (ARP) TCP/IP can use any of the three address resolution functions relaying on the addressing procedure used by the underlying hardware. To guarant
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a) Calculate the CRC for the frame below: Frame: 1101011011 Generator: 10011 Message after appending 4 zero bits: 11010110110000 b) OSI refers to a system in which any
Problem 1 Solve the following Caesar cipher by showing your working: EM KIUM EM AIE EM KWVYCMZML Problem 2 Compare and contrast between block and stream ciphers, listin
Thinking ethically is difficult without a background in moral philosophy. Asking people to embrace ethics without offering practical explanation of the efficacy of so doing, is a t
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QUESTION (a) Briefly explain the contents of the Needs Analysis, which is step in the process of network design. (b) Describe on the three ways of improving the performan
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