CTF write_up/2019 SUA CTF

[Crypto] BaseXX

ws1004 2019. 8. 16. 01:02

문제를 확인하면 다음과 같은 문자열이 있습니다.

MYYXKN2OMV2VMQLNK5WXA4SPLFCG4USXIRDUK3ZULFVVUUBVJBHWU4DBOVMWK4CBJA3UM4CVKZKUOSDTNVEVA32CJRAXE22NKRZVUOJSMZYTO===

 

평문 -> base32 decode  https://emn178.github.io/online-tools/base32_decode.html

 

base32 code -> base58 decode  https://www.better-converter.com/Encoders-Decoders/Base58-Decoder

 

base58 code -> base85 decode  https://www.dcode.fr/ascii-85-encoding

 

base85 code -> base64 decode  https://www.base64decode.org/

 

Flag : 2019suactf{variable_base_XX}