Decrypt the following messages encrypted using the Caesar cipher $f(p)=(p+3)\; mod\;$26
Alphabet: A,B,C,D,E,F,G,H,I,......,Z
Entered HDW GLP VXP
my answer is: KGZ JOS YAS
but my answer is wrong
$\endgroup$ 22 Answers
$\begingroup$Hint. I think you encrypted the already encrypted message. What function decrypts?
$\endgroup$ $\begingroup$!!DECRYPT!! the following messages encrypted using the Caesar cipher f(p)=(p+3)mod
26
Alphabet: A,B,C,D,E,F,G,H,I,......,Z
Final message (AFTER it was encrypted) is: HDW GLP VXP
my answer is: KGZ JOS YAS
but my answer is wrong
====
The ORIGINAL message was ??????. It was !!EN!!crypted by adding 3 so to get HDW GLP VXP.
So we need ??? ??? ??? ---- +3 -----> HDW GLP VXP
What you did was ??? ??? ??? ----- +3 -------> HDW GLP VXP ------ + 3 -----> KGZ JOS YAS
You need to do the opposite to go BACK to the original
??? ??? ??? <----- -3 ------- HDW GLP VXP <------ - 3 ----- KGZ JOS YAS
Hint: It's about food.
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