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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.
Hybrid Cryptography Systems This makes use of different cryptography systems. Except digital certificates, pure asymmetric key encryption is not used extensively. Asymmetric enc
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QUESTION : a) A datagram of 3000 bytes has to travel over a network with a MTU size of 1000 bytes. Describe how fragmentation can be used to solve this problem. You should pr
What is information Information comprises the meanings and interpretations which people place upon the facts, or data. The value of information springs from the ways it can be i
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Proof that the sender forwards the message. It also prohibits the author of the code from falsely denying that he forward the message. This is achieved by record using the exact ti
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