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Question 1
(a) Explain briefly the following terms as used in network security:
(i) Denial of service (DoS) attack
(ii) Birthday attack
(iii) DeMilitarized Zone (DMZ)
(iv) Social Engineering
(v) Pretty Good Privacy (PGP) algorithm
(b) (i) List three benefits of using IPSec.
(c) Briefly explain the Cipher Block Chaining (CBC) mode of operation stating its advantages, disadvantages and uses.
(d) Describe five guidelines for a desirable password selection and use policy in a corporate organisation.
Secure Socket Layer (SSL) accepts a combination of asymmetric and symmetric (public-key) encryption to accomplish integrity, confidentiality, authentication and non-repudiation for
PARITY BIT: A parity bit is an extra bit transmitted with data item select to give the resulting bit odd or even parity. For example an even parity data packet 10100001 has p
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LOG FILE MONITORS Log file monitor (LFM) is similar to NIDS. It reviews log files generated by servers, network devices, and even other IDSs for patterns and signatures. Pattern
Encode the following plaintext, using the Caesar cipher: LORD OF THE RINGS b) The following ciphertext jw njbh lxmn cx kanjt has been encoded using a
(a) Using Fermat's theorem, find 3 201 mod 11. (b) Explain how the Diffie-Hellman key agreement protocol works and what its purpose and main properties are. Consider a Dif
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