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Ask HN: Anyone Interested in Capture the Flag (CTF) Events?

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Re: Ask HN: Anyone Interested in Capture the Flag (CTF) Events?

#22
post #17

I ran the DEF CON CTF from DEF CON 20 to DEF CON 25. Prior to that, I won a few. I know order of the overflow is running a good game now. It’s different than what we did, but it’s a good direction, and I am hopeful it will continue to grow. They (like we did) have a few selected prequalification events tbgat are generally pretty high quality. See https://www.oooverflow.io/dc-ctf-2019-quals/ PlaidCTF was an old favori…

>seems to understand what makes a good challenge, what makes a challenge hard, and more importantly, what DOESNT make a good/interesting challenge Any tips in this area?

Plaid Parliament has a writeup on this that could be considered borderline canonical [1]. From some other Plaid folk, Maxims [2] are great as well.

To sum it up, players should learn something and players should not have their time wasted.

[1] https://github.com/pwning/docs/blob/master/suggestions-for-r... [2] http://captf.com/maxims.html

Re: Ask HN: Anyone Interested in Capture the Flag (CTF) Events?

#23

I recently made an unusual audio processing challenge where the goal is to recover the English text that a user is typing, just by analysing the recorded sound of their keyboard [0]. Not sure how hard it is. I am able to solve it with my own audio processing tools. If interested - give it a try. [0] https://ggerganov.github.io/keytap-challenge/

I am very much interested in this. Would you be willing to work with me offline on this? It's an area of research for me that I find fascinating, yet I have difficulty finding information for legitimate reproduction of the techniques that I hear about.
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