Thanks again for running the competition. I understand and follow your rules regarding only using tools provided here and software written myself to solve the challenges. But, it may be worth thinking about running an open challenge at some point. Not part of the competition itself, but an opportunity for anyone interested to explore and use the tools provided by CyberChef and the like. I haven’t used them myself, but they look a terrific resource for anyone interested in following a career in cryptography, cybersecurity, or just exploring similar avenues in considerable depth. It would seem a natural progression for anyone already showing an interest in cryptography.