Please do not submit challenges that already appear on CTFlearn in whole or in part. If you do, no problem, but you'll have wasted your time. Feel free to ask on discord to be sure.
Please do not submit challenges that rely on specific information that solvers must guess.
Bad Crypto Example: Please decrypt this: 9463481986
Good Crypto Example: This file [link] was encrypted with this python script [link]. Do you think you can recover the initial file?
Challenge descriptions should be in English unless another language is specifically required to create a challenge.
Challenge solutions (required below) should be detailed, clear, and concise. We do not have time to solve and review all the challenges submitted.
We appreciate each and every challenge submitted to the site. Challenge creators are what keep the website lively. If you have any questions about creating challenges please reach out to a mod on discord.