Question

Using a Caesar Cypher with an offset of three characters (a -> d, b ->e, ...., z ->c), what would be the correct cypher text for the plain text "attack at dawn"?a. dwwdfn dw gdzqb. nyythd oj kgedc. cuuwfe as ijhzd. attack at dawn

Answer 1

The answer is a. dwwdfn dw gdzq

When you shift the letters advancing (offset) to 3 characters, your new alphabet chart would be :

Plain Alphabet  ABCDEFGHIJKLMNOPQRSTUVWXYZ

Caesar Alphabet (+3) DEFGHIJKLMNOPQRSTUVWXYZABC

D would be the start of the Caesar alphabet as you advanced to 3 characters: A B C. Then look at the new equivalent letters from Plain alphabet row to Caesar alphabet row.  

A T T A C K A T D A W N

D W W D F N D W G D Z Q