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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, listing the relative advantages and disadvantages.
Problem 3
(a) What the 3 main steps in DES encryption?
(b) Explain how triple DES works.
(c) Explain the term steganography and give 4 examples.
Problem 4
Critically assess the given statement:
"The longer the key, the stronger the encryption." Give examples and justifications.
(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
Get a copy of Metasploitable at Make">http://sourceforge.net/projects/metasploitable/files/Metasploitable2/ Make sure to follow these directions very carefully. You will get po
The world has to deal with newly released vulnerabilities on a daily basis. These vulnerabilities eventually lead to active exploits of systems, and it is our job as cyber securit
(a) Using the extended Euclidean algorithm, find the multiplicative inverse of 504 mod 67. (b) Decrypt the following ciphertext, which has been encrypted using Caesar cipher:
FRAME FORMAT AND ERROR DETECTION The changed frame format also adds CRC. If there is an error happened in frame, then it typically causes receiver to removed frame. The frame
state the fundamental principles of 3gpp security
SDLC Systems development life cycle (SDLC) is process of developing information systems through analysis, design, investigation, implementation and maintenance. SDLC is called as
Identify Possible Controls For each threat and linked vulnerabilities which have residual risk, create primary list of control ideas. Residual risk is the risk which remains to
Question: a) Give two reasons why the building-block approach is favoured to the traditional network design approach. b) With reference to network monitoring parameters, dis
(a) Explain the two possible configuration for 3DES. (b) What is the main disadvantage of 3DES? (c) Why are most modern symmetric algorithm block ciphers? (d) Describe
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