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Question:
(a) State whether the following statements are TRUE or FALSE. Justify your answer.
i. A good site security policy will require that users use computer generated password that are changed monthly.
ii. Mandatory Access Control policy allows the current owner of a data file to specify who has access.
(b) How is dictionary attacks made difficult against Unix systems? Which file is instrumental in preventing dictionary attack altogether?
(c) Which database recovery techniques provide an exact, up-to-date copy of the database maintained at an alternative location?
(d) What combination of backup strategies provides the fastest backup creation time?
(e) Given that a file in UNIX has the 9 mode bits set as follow: 111 110 100, describe the access rights encoded.
(f) What is the major difference between a virus and a worm?
Question: (a) Explain the following security services: Confidentiality, Availability. (b) Which attack will be used to bypass even the best physical and logical security m
(a) What is a pseudorandom generator? Give an example describing how it works. (b) Explain the key components of a wireless network and their purpose. (c) Describe the authen
QUESTION: (a) Explain, with the aid of a diagram, a Star topology of a network of your choice. (b) Illustrate on the use of a MAN and give an example of one. (c) Describe
for making the assignment
Question 1: (a) With the help of a diagram show the basic structure of a computer system. (b) Explain as fully as you can each of the parts mentioned above. (c) What are
Attacks on Cryptosystems Attacks are attempts to achieve unauthorized access to secure communications have characteristically used brute force attacks. Attacker may alternatively
SHIFT OPERATION: This operation replaced all bits to the left one position. For example in the diagram below a 16-bit CRC hardware is given, which needs three Exclusive OR (
In the e-mail system, where the e-mail messages are saved and why? E-mail messages are saved in user’s private electronic mailbox. A mailbox refers to a local/domestic hard drive c
You are designing a Demilitarized zone for a large corporation. Using design best practice, and the information that you have learned so far, propose a design that will provide the
Cipher Methods There are 2 methods of encrypting plaintext: • Bit stream method – every bit in the plaintext bit is transformed into a cipher bit one bit at a time. • Block cip
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