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Using the Vigenere cypher with the encryption table shown in Figure 3 . 1 and the key computersecurity: Figure 3 . 1 ( a )
Using the Vigenere cypher with the encryption table shown in Figure and the key computersecurity: Figure a Encrypt the message "Today is a good day." with an explanation of your method. b Decrypt the message "Icas fngb omvb kpx czoy." with an explanation of your method. c Discuss how you would improve the Vigenere cypher to make sure it implements both confusion and diffusion in the cyphertext.
Using the Vigenere cypher with the encryption table shown in Figure and the key
computersecurity:
Figure
a Encrypt the message "Today is a good day." with an explanation of your method.
b Decrypt the message "Icas fngb omvb kpx czoy." with an explanation of your method.
c Discuss how you would improve the Vigenere cypher to make sure it implements both
confusion and diffusion in the cyphertext.
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