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

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  

Caesar Alphabet (+3)

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

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