TOPIC: Numbers and Pattern   Use the equation ? = 3? + 7 (modulo 28), to: (a) encrypt the word “BE EXTRA CAREFUL!”; and (b) decrypt the hidden message “LVV!GHJYV”

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Chapter2: Second-order Linear Odes
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TOPIC: Numbers and Pattern

 

Use the equation ? = 3? + 7 (modulo 28), to:
(a) encrypt the word “BE EXTRA CAREFUL!”; and
(b) decrypt the hidden message “LVV!GHJYV”

 

Refer to the following correspondence between the set {A, B, C,.…..,Y,Z,!,_} and the modular set Z28
under the operations addition and multiplication modulo 28:
A+1, B→2, C-3, ..., Y+→ 25, Z+ 26, !→ 27, space + 0;
Transcribed Image Text:Refer to the following correspondence between the set {A, B, C,.…..,Y,Z,!,_} and the modular set Z28 under the operations addition and multiplication modulo 28: A+1, B→2, C-3, ..., Y+→ 25, Z+ 26, !→ 27, space + 0;
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