This recently released challenge, categorised as “very easy”, is fun to solve. The zip folder below contains my decrypt.py file; this zip is, of course, password protected with the flag you need to enter on the Hack The Box platform

This challenge shows one of the most significant weaknesses of the ChaCha encryption algorithm. Namely, if a key stream is used more than once (which should not happen). Try to find some resources on ChaCha, and good luck solving this challenge yourself!