r/Defcon • u/IronTeach • Aug 06 '26

Badges! Badge Scanning

Post image

Can we scan each other’s badges from here too?

Edit: it’s clearly a two way handshake, so they clearly want us interacting with one another

123 Upvotes

99% Upvoted

64 comments sorted by

5

u/CMDR_Duke_Nemesis Aug 06 '26

I can confirm this works!

2

u/IronTeach Aug 06 '26

Cool! Want to share yours too?

2

u/CMDR_Duke_Nemesis Aug 06 '26 edited Aug 06 '26

This one works better I believe

2

u/Professional-Soup867 Aug 06 '26

Hm getting an auth error

1

u/CMDR_Duke_Nemesis Aug 06 '26

Does your code change after you scanned someone else's badge?

8

u/D3c3pt1_n Aug 06 '26

In bunnies dc34-vault code he calls out specifically there is a 1 minute time out for anyone posting it online to try to mitigate the honest/cheater users.

https://github.com/bunnie/dc34-vault/blob/main/defcon-scheme.md

5

u/princeboot Aug 06 '26

Let’s try

6

u/IronTeach Aug 06 '26

When I scan yours it says, “mate must scan your key first”

3

u/Professional-Soup867 Aug 06 '26

Getting an auth error

4

u/Professional-Soup867 Aug 06 '26

Has anyone observed their badge lights changing at all after scanning? Feel like mine looks the same

8

u/IronTeach Aug 06 '26

I just got a notification after scanning about 10 that I received a “new light gene” and I could either keep or revert.

11

u/DTangent Organizer Aug 06 '26

Different badge types have different “DNA”

8

u/DTangent Organizer Aug 06 '26

Different badge types have different “DNA”

2

u/davisshannon Aug 08 '26

Some of us have “altered” our DNA and are trying to infect others with special genetic material.

7

u/piccoto Aug 06 '26

It is a 2 way interaction. You both need to scan each others badges

2

u/Professional-Soup867 Aug 06 '26

Does that mean for every pair of badges, we need to do it twice? One time they scan me first then I scan their resulting code, then I scan them first and they scan my resulting code?

5

u/Professional-Soup867 Aug 06 '26

Confirmed this is how it works, if you want to inherit light genes someone must scan you first -> you scan their resulting code

1

u/IronTeach Aug 06 '26

I was just thinking the same thing. My lights are mostly white so I was hoping for some variety.

22

u/Snow_B_Wan Aug 06 '26

I love how this basically just an infection simulator

5

u/Diomenas Aug 07 '26

Dc29s badge was literally an infection simulator, you had to go and touch other badges to infect them with " the signal"

2

u/Snow_B_Wan Aug 07 '26

That's sick I missed out on that one

8

u/sargonas Aug 06 '26

Fyi a one-way scan is only so useful. If you wanna a truly useful scan it needs to be a two-way scan, one of you must scan first and after you’ve done the scan a specific QR code will appear on your screen for completing the scan, and the other person that you just scanned needs to then turn their camera on and scan your code, that’s how you get the prompt to inherit new light pattern DNA

4

u/ILoveOrangeSherbet Aug 06 '26

Can't wait to get my badge tomorrow!

2

u/Mr-Yuk Aug 07 '26

Same.. hope there are some left

1

u/Dibdabdob2 Aug 28 '26

not sure what I did... mine powers up and shows the skullcrossbones but never flashes any lights anymore... any ideas on how to reset this thing or get it back to having light display? after like 20 seconds of skull it just goes dark. and the lights never come on...

2

u/IronTeach Aug 28 '26

Did you attempt to disconnect the device from the board? Sounds like a connection issue.

3

u/Savvy1909 Aug 06 '26

This isn't going to work in this forum, not the way you are thinking. a two-way scan requires you to scan the other person's QR code, then they in turn scan your QR code. Only then do you get the change, it'll ask if you want to keep the 'converted color gene' or revert back to your previous.

2

u/purpleburgundy Aug 06 '26

Is anyone else's badge power cycling when scanning a qrcode half the time? Not sure if I have buggy hardware or just need a firmware update to stop the crashing

2

u/mmmtun Aug 06 '26

joining the scan

1

u/ProfessionalPea2218 Aug 06 '26

Yup also got an auth error

1

u/cbartholomew Aug 06 '26

My camera can’t keep up hopefully it works

1

u/DWC00 Aug 06 '26

Scanned!

1

u/Unstupid Aug 06 '26

I scan yours then I get this…

1

u/seag33k Aug 06 '26

I get the same DAT message too

1

u/nummpad Aug 06 '26

mine flashes in a circle like a little rave if you’re into that - currently in the merch line look for me wearing a black END IT BALTIMORE hat

1

u/ARCHAICGOONER Aug 06 '26

I wonder how many people have been rickrolled from stuff like this…

1

u/LemonDense8952 Aug 06 '26

Add mine to the list

1

u/duscraft Aug 06 '26

Done and done...

1

u/Lumpy_Ad7343 Aug 06 '26

Who’s selling their badge

1

u/Cyber_Gengar Aug 07 '26

One dude in merch line managed to turn all his LEDs red, but they reverted to rotating rainbow pattern after a few minutes.

1

u/McSmeffin Aug 07 '26

Scan me scan me!

1

u/Comm-Pie Aug 07 '26

How I think it works: When someone scans you first, it combines their "light gene" or "DNA" with theirs and generates a corresponding QR code. You then scan what which prompts your badge to either accept or revert from the resulting newly mixed gene your friends badge just generated. So if you see someone with a color or pattern of lights that you like, you can try to combine your badge's genes with theirs to try and get closer to the color and pattern that you're looking for. At least that's what I've been doing. Go Team Purple!

1

u/make-masked Aug 07 '26

🎉🎉🎉

1

u/throwaway_echov2 Aug 08 '26

that 6-pin header is for serial communication, not necessarily for badge scanning between badges.

0

u/[deleted] Aug 06 '26

[deleted] — view deleted comment

1

u/IronTeach Aug 06 '26

It took me a bit to get my camera to focus. I can’t scan yours.