Code the following message YOU FORGOT YOUR KEYS by means of Caesar's method with key $$18$$.
See development and solution
Development:
We represent in a table the new alphabet:
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 | Z |
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 |
We replace every letter of the original message with its correspondent in the new alphabet:
Y | O | U | F | O | R | G | O | T | Y | O | U | R | K | E | Y | S |
Q | G | M | X | G | J | Y | G | L | Q | G | M | J | C | W | Q | K |
Solution:
The coded message will be: QGMXGJYGLQGMJCWQK.