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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.
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What do you understand by the term encryption? Also describe the public key cryptography Encryption: Encryption is a method of converting plain text into cipher text. Using thi
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(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
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