Cryptography

[Dreamhack] Basic_Crypto1 write up

chltjdbs 2023. 6. 8. 07:19

Basic_Crypto1

This Problem Basic_Crpyto(Roman emperor’s cipher)

FLAG FORMAT(A~Z) and empty is “_”

DH{decode_Text}

 

txt 폴더안에 

EDVLF FUBSWR GUHDPKDFN 

이렇게 적혀 있는거 보고 카이사르 암호문인걸 알았다 

caesar decoder라고 구글링을 해서 dcode 사이트에 돌렸더니 

https://www.dcode.fr/caesar-cipher

 

Caesar Cipher (Shift) - Online Decoder, Encoder, Solver, Translator

Tool to decrypt/encrypt with Caesar cipher (or Caesar code), a shift cipher, one of the most easy and most famous encryption systems, that uses the substitution of a letter by another one further in the alphabet.

www.dcode.fr

BASIC CRYPTO DREAMHACK

이 형식으로 나와서 문제에서 말한 플래그 형식으로 넣었음

DH{BASIC_CRYPTO_ DREAMHACK}