Marks 25 Instructions: 1. 2. 3. 1. This is an individual assignment. 2. Plagiarized work will be given ZERO Marks. 3. Follow the deadlines and bring relevant sections for discussions

and corrections. 4. Submission Due Date: Thursday, 22 February, 2024. CIS 5370 Principles of Cybersecurity Assignment 2 Decrypt the following encrypted quotation using Substitutions Caesar Cipher. Permutation: (λ) = (λ+9) mod 26 bd L 1 nb b rb |j a P mn Bcrwjcrxw Decrypt the following encrypted quotation. (Permutation: (x) = ((25-x) + 9) mod 26) mIK sx dawn h a q w IV k mik q mba xe a Q t u q quanh xe uvxk tuqqah xe pu dia x a v puqog gee F 1 W X C J av [5 marks] uve Decrypt the following encrypted quotation. (Keyword = monoalphabetic). jmjmj gsmsg lrjgu csqyj quflr mfajq erdmc CmqlV lqyhg gawgq arpgq sblce jrlrj Inemc cyjqu flrmf ajqer d [5 marks] [5 marks] 4. 5. Referring to the substitution table shown in Figure 1, given the password 'PRECIOUS', encrypt the message 'TODAY IS THE DAY’ using Vigenere cipher. G H I J K L M N V W X Y Z B C D E G H I J K L M N O P Q R S T U V W X Y Z A C D E F G H I J K L M N O P Q R S T U V W X Y Z A B DE F G H I J K L M N O P Q R S T U V W X Y Z A B C E F G H I J K L M N O P Q R S T U V W X Y Z A B C D F G H I J K L M N O P Q R S T U V W X Y Z A B C D E G H I J K L M N O P Q R S T U V W X Y Z A B C D E F HIJ K L M N O P Q R S T U V W X Y Z A B C D E F G I J K L M N O P Q R S T U V W X Y Z A B C D E F G H J K L M N O P Q R S T U V W X Y Z A B C D E F G H I K L M N O P Q R S T U V W X Y Z A B C D E F G H I J L M N O P Q R S T U V W X Y Z A B C D E F G H I J K M N O P Q R S T U V W X Y Z A B C D E F G H I J K L N O P Q R S T U V W X Y Z A B C D E F G H I J K L M O P Q R S T U V W X Y Z A B C D E F G H I J K L M N P Q R S T U V W X Y Z A B C D E F G H I J K L M N O Q R S T U V W X Y Z A B C D E F G H I J K L M N O P R S T U V W X Y Z A B C D E F G H I J K L M N O P Q S T U V W X Y Z A B C D E F G H I J K L M N O P Q R T U V W X Y Z A B C D E F G H I J K L M N O P Q R S U V W X Y Z A B C D E F G H I J K L M N O P Q R S T V W X Y Z A B C D E F G H I J K L M N O P Q R S T U W X Y Z A B C D E F G H I J K L M N O P Q R S T U V X Y Z A B C D E F G H I J K L M N O P Q R S T U V W Y Z A B C D E F G H I J K L M N O P Q R S T U V W X Z A B C D E F G H I J K L M N O P Q R S T U V W X Y Figure 1 [5 marks] Using One Time Pad key XFZLTID create cipher text for message "WELCOME" and then decrypt the ciphertext. [5 marks] 2