Amazing Crypto - CTF 18
CTF Name: Amazing Crypto
Topic: Cryptography
Flag Format: IHC_CTF{}
CTF Link: https://t.me/ctf_invisiblehc/32
Description:
Cryptography is so amazing. It is very simple. But sometimes it will be rotated your head.
Solution:
We received a text file with a challenge. When we opened the file, we found a ciphertext in base62.
Next, we used CyberChef to decode the cipher, revealing another ciphertext in hexadecimal format.
After decoding the hexadecimal ciphertext, we came across another ciphertext in Base64.
Decrypting this Base64 ciphertext, we obtained yet another ciphertext, which was encrypted using ROT47.
Once we decoded the ROT47 message, we finally discovered the flag.
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IHC_CTF{4N07H3R_CRYP70_mmfihc}
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