OK let's get started
davedarko colrceyhnpagtle. sounds klingon.
Sophi Kravitz Who here worked on a badge?
Karl Koscher I certainly did
Bill-Paul I did. https://dc25spqr.com/
Sophi Kravitz // waits ....
jculberts I help Karl
Sophi Kravitz Alright then! Karl and Bill, can you introduce yourselves? And then I reserve the right to ask the first question
Sophi Kravitz Sorry Bill-Paul
Karl Koscher Sure! I'm one of the organizers of the Crypto and Privacy Village at DEF CON. Part of my responsibilities include producing the badge :)
I did firmware development for the Ides of DEC CON badge along with John Adams. (Our friend Egan Hirvela did game play design for us and Matt Harris did the character art.)
Bill-Paul I also work in the VxWorks Core OS group at Wind River Systems (an Intel company).
Sophi Kravitz So first question is from me: how do you define crypto challenge? is there a challenge that everyone knows about or do you have to guess that there is one happening?
Sophi Kravitz (after you guys are done with intros)
We have done a couple of crypto challenges in the past. They usually take the form of puzzles with elements that are woven into various things
Karl Koscher This year we had a snapchat filter which interacted with the floor to produce something, puzzles on the physical badge, part of puzzles on the lanyard and keys we gave out, and a bunch more on our website
Bill-Paul In our case there were a couple of puzzles (which John worked on mostly). There was a URL that led to some puzzles, and we had one special unlock code that led to a puzzle for an invite to a party at the con.
-= Wolf =- what is the main purpose of a crypto challenge? to grow interest on Crypto software?, to keep people interested on the subject? or just fun?
Karl Koscher In the past, we used the badge to validate answers to the puzzle, and even had a challenge hidden in the badge
Sophi Kravitz @Karl Koscher how did people know there was a challenge?
Bill-Paul Oh, also, one of our sponsors (Avast) asked us to include a touch-tone audio sequence which would lead you to an IP address and port where they had an old school BBS set up.
Karl Koscher I guess if it's your first time at DEF CON you might not know, especially if you don't interact with other people, but it's pretty obvious to people looking for one
Karl Koscher like, we have random letters on the lanyard. what other purpose would those have? :)
Karl Koscher and random dot patterns on the badge
Sophi Kravitz ah ok
Sophi Kravitz I have not been to DEF CON
Bill-Paul Apparently some people can decode the tones by ear so we were counting on that.
Karl Koscher I believe this year we actually had handouts for some of the puzzles at our info desk, so it was easy to find
Sophi Kravitz I imagine that many people on this chat haven't been either
Shulie: Decode the tones by ear, wow, that is insane. :)
Sophi Kravitz by ear???? WHAT?
@Karl Koscher are you LosT/李智上 on twitter?
Bill-Paul Yeah, I think hard core phreakers have the sounds memorized or something. :)
James Murphy I've been following Def Con for about 7 years but have never attended. I would like to but $$ is the issue.
Karl Koscher I am not LosT
Bill-Paul I actually have a touch-done decoder board I built years ago using a DTMF decode chip from Radio Shack which I used to validate that we were generating them right.
Bill-Paul Of course you could also just look in the source code. :)
jculberts These are the puzzles at the top of the badge.
Frank Buss I tried some of the puzzles, but too complicated for me
jculberts dang, it didn't keep the rotation.
Karl Koscher @jculberts: can you also post a photo of the dots?
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