Brailene - CTF 100
CTF Name: Brailene
Topic: Cryptography
CTF Link: https://t.me/ctf_invisiblehc/160
Description:
If you have basic knowledge of cryptography, download the file and decode it. Decode it again, repeatedly.
Solution:
When I opened the file, I found a ciphertext. I used a cipher identifier and identified it as the Braille cipher. After decoding that, I found another cipher, which turned out to be an octal cipher. I continued decoding and found another cipher, which started with "==," so I suspected it was base64, but it was reversed. After correcting the text and decoding base64, I found another cipher, which was Base85. I decoded that and found something in hex format, but with "%%." I used a URL Decoder to decode that and found a hex cipher. After decoding the hex, I finally found a plaintext. However, it was a fake flag and there was a hidden hint in flag format that told me to remember something. There was also a ciphertext, so I identified it as a Vigenere cipher and used the key "MayaCTF" to find the flag.
Flag: MayaCTF{Y0UM4NACRYPT01337}
Join Our CTF Channel: