English Alphabet (A..Z) are represented numerically by (0..25), e.g. A is 0, B is 1, etc....

English Alphabet (A..Z) are represented numerically by (0..25), e.g. A is 0, B is 1, etc. Use Caesar’s Cipher to encrypt the message HELLO WORLD with the Key being 4.

Expert Solution

Char = H
   H is 7
   7 + 4 = 11
   11 mod 26 = 11
   11 => L
Char = E
   E is 4
   4 + 4 = 8
   8 mod 26 = 8
   8 => I
Char = L
   L is 11
   11 + 4 = 15
   15 mod 26 = 15
   15 => P
Char = L
   L is 11
   11 + 4 = 15
   15 mod 26 = 15
   15 => P
Char = O
   O is 14
   14 + 4 = 18
   18 mod 26 = 18
   18 => S
Char = W
   W is 22
   22 + 4 = 26
   26 mod 26 = 0
   0 => A
Char = O
   O is 14
   14 + 4 = 18
   18 mod 26 = 18
   18 => S
Char = R
   R is 17
   17 + 4 = 21
   21 mod 26 = 21
   21 => V
Char = L
   L is 11
   11 + 4 = 15
   15 mod 26 = 15
   15 => P
Char = D
   D is 3
   3 + 4 = 7
   7 mod 26 = 7
   7 => H
Answer: LIPPS ASVPH

venereology answered 2 years ago

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