Fourth in line in the Crypto challenge for me was this probably math heavy challenge that I found a secondary solution to. At the heart of it was a bespoke encryption algorithm and an oracle who you can leak the secret from. More details below…

Really Awesome CTF is back in 2021 with some very interesting challenges. This RSFPWS challenge category was particularly fun as it was a 3d game client hacking adventure in 3 parts. I was able to solve all of them and here’s a writeup of the one that had the fewest solvers “Teleport”.

This Web challenge category was oddly misplaced and maybe should have existed within the Reversing category instead but no matter. I class this as a reversing + crypto challenge and I also had a lot of fun solving it as it involves a Golang program which is certainly my favourite language to code in these days.

Cool CTF with a bunch of wicked challenges. Of course as usual, limited time for me so I only attempted some basic challenges but even these basic challenges were not a pushover. Let’s talk about these that I solved:

Cool RSA crypto challenge in a CTF that I had a lot of fun with. I especially liked the beginner section which had a nice gradual ramp up with challenge difficulty. The final beginner challenge in each category was like a combo of what you had done until that point.