Secret Saesar | CyberStart Completion

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Secret Saesar

Briefing:

Our agents have been reviewing some documents they recovered from one of The Slootmaekers bike shops and they came across an order form for a set of six bikes which looks a little odd.

We think the six bike reference numbers might be encrypted with a Caesar Cipher (which is where the letters are shifted along by a certain offset, e.g. if the letter is A and the offset is 2 it will become C), and we’ve got some intel that one of them contains a code that starts with the word “BAR”. We’ve worked out that the offset for each code is determined by the order quantity. See if you can use that to break the encryption and find the hidden code.

Tip: The decrypted reference number containing the word BAR is the flag.

Hint:

Consider looking up what a Caesar Cipher is online if you don’t know. Also, keep in mind that each reference number is encrypted with a different offset based on the order quantity.

How to Solve:

Encrypted	Decrypted	Shift
UCFFNG	SADDLE	24
TFBUQPTU	SEATPOST	2
GVERO	CRANK	4
CNKKR	WHEEL	6
GFWXYJR	BARSTEM	5
FKDLQ	CHAIN	3

Answer

BARSTEM

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