Answer to Question #259774 in Discrete Mathematics for rtf

Question

Using Caesar cipher, encrypt the word “pizza” mathematically with a shift of 3

Answer 1

A Caesar cipher involves replacing each letter in the message by a letter that is some fixed number of positions further along in the alphabet.

for the English alphabet: 

0 1 2 3 4 5 6 7 8 9 10 11 12

A B C D E F G H I J K L M

13 14 15 16 17 18 19 20 21 22 23 24 25

N O P Q R S T U V W X Y Z

then:

letter number

p 15

i 8

z 25

a 0

Now add 3 to each number to get: 18 11 2(27) 2(27) 3

so, we get: slccd