Category: Crypto Points: ??? Solved By: Apicius
Challenge
Good news everyone! We have been tasked with deciphering a secret message from a less than friendly group of aliens! We know that they use the results of the popular "Alien Wordle" game as a key for their daily encryption method, that they love old human ciphers, and we got a copy of their game in progress. The bad news is, none of us can read alienese. Can you figure out the message?
Submit the result like this: shctf{decrypted_text_here}
*Author: Cody
Files: Alien_Wordle.png, cipher.txt
Solution
The first thing I did with this challenge was check the Alien_Wordle.png image.
Knowing that this challenge is Futurama themed, I searched for a Futurama alien language cipher. This allowed me to decode this image with the final row of the wordle being: STAR__S_. This means that the expected answer for the Wordle is STARDUST.
With cipher.txt being trt3_db_mz1gq_fekdf_x1ty, and the challenge description saying that the aliens liked old ciphers, I decided to throw it into vigenere. Lo and behold, that popped the flag.
Flag: shctf{byt3_my_sh1ny_metal_flag}