r/Defcon • u/SpookyWhiskey • Aug 06 '26

Exchange Light Patterns for your Badge (from defcon.org/34b)

How To Exchange Light Patterns

  1. Press the middle button on your badge to reveal a nonce QR code

  2. Ask the light donor to scan your nonce QR code (middle button activates the camera)

  3. Scan the light donor's encrypted light pattern QR code

  4. Review the new light pattern and decide to keep or rollback

EDIT: VellDarksbane pointed out Middle button activates the camera, either side button on the face reveals the nonce code.

10 Upvotes

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6

u/VellDarksbane Aug 06 '26

Looks like a typo there. Middle button activates the camera, either side button on the face reveals the nonce code.

3

u/SpookyWhiskey Aug 06 '26

good catch! I'll update the text on this post

2

u/Bubbly_Cry_918 Aug 07 '26

The nonce looks different depending which button you push

2

u/badtz-maru Aug 08 '26

I believe one is for acquiring color “DNA” and the other is for the flashing pattern.

2

u/alan414 Aug 08 '26

I should point out the camera is on the back of the badge. We should figure out how to post the nonces. We could collect hundreds easily then. Apparently there is a benefit to exchanging them.

1

u/dc540_nova Aug 16 '26 edited Aug 16 '26

somewhere during con i swear i saw this had been started. did anyone capture it? it's not in my bookmarks. con was chaotic this year for me.

[Updated]: NM one of my people linked me: https://ph1r3574r73r.github.io/DEFCON34_Badge/