Basic explanation of the challenge : In this challenge, the goal is to get rid of all the « 1 » in the matrix that we get from their netcat server.To do […]

Catherine Zeta-Jones was born on September 25th, which was the starting day of the CTFs, on certain time zones. Goals The server code is available, but that’s all. We have […]

The goal is to decrypt some binary data. The title implies that there is some sort of XOR cypher. Let’s look at the blob in an hex view: There’s text […]