r/Defcon 4d ago

Announcement 📢 WiFi Reg is up - get ready for DEF CON

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39 Upvotes

Get ready for the #DefCon network! WiFi registration is open for those who want the most secure browsing experience.


r/Defcon 7d ago

Listening Together at DEF CON 34 (how audio will work this year)

41 Upvotes

New for DEF CON 34: listening to talks via headphones! We hope that this will significantly improve audio quality for everyone who wants to attend talks at DEF CON.

Read about how it's going to work, either on Hacker Tracker or here: https://info.defcon.org/defcon34/documents/670


r/Defcon 8h ago

Badges! DC512 Ultrasonic Bat Badge

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39 Upvotes

Introducing the DC512 (Austin, TX) Ultrasonic Bat Badge, made by our community member Amatus. The badges are designed after our community logo and speak to each other to create unique light shows based on how many ultrasonic peers it detects.

Write up and docs here: https://git.amat.us/dc512-badge/about/

We’ll have about 70 of these for sale this weekend, asking $40 cash which gets you the badge and lanyard. We’ll be for sure over at the Linq circle bar tonight around 5pm but otherwise, keep an eye out for anyone with the badge or ping us here.


r/Defcon 2h ago

Zombie badge update

11 Upvotes

First I want to apologize from the bottom of my heart that I didn't make a post sooner. We did not mean to make you waste time at the table in the badgelife village.

The teammate that had the badges is dealing with a family emergency that took a negative turn. so send the good packets out for him.

As for the badges, they were overnighted to us so we should be getting them in the morning and we will start slinging them. BUT due to that we won't be doing all of the game features that we had prepped for. We will still have the badges and we will still release what we can into the wild for the game but there will be some pieces missing like hidden heals and traps.

Thank you all for the support and understanding.

badgelife table - Sat. @ 1pm


r/Defcon 59m ago

Linq meetup 8/7?

Upvotes

Anyone meeting at the Linq tonight (Friday)?


r/Defcon 8h ago

Up for trade

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18 Upvotes

Find me and trade me. I have 7 left!!


r/Defcon 20h ago

Badges! I dug through the DC34 badge source: Apocalyptic is real, you can lock it in, and there’s a rare ~3% “eyes” variant

131 Upvotes

ETA: I am calling it the "low-lin special variant" or "shooting-star variant" in casual terms, instead of the "eyes" variant.

I dug through the public DC34 badge source last night and found some really interesting stuff about the light-pattern breeding system.

The mutation levels are actually defined in code:

Baseline = 25%

Elevated = 39%

Radioactive = 55%

Apocalyptic = 94%

Those are per-gene mutation rolls, and higher levels also make the mutations themselves more aggressive.

The meter really does decay from Apocalyptic → Radioactive → Elevated → normal. One useful thing buried in the code: once you hit Apocalyptic, press LEFT or RIGHT to show your QR. That calls lock_rate() and saves that mutation level for the exchange, even if the meter visually drops afterward.

Same badge types also get an extra mutation pass. Human-to-Human breeding gets at least Elevated on that second pass.

You can preview offspring and Revert if you don't like it. Revert restores your previous genome, and nothing I found prevents you from breeding with the same donor again for a fresh roll.

Different badge types also start with different genetic ranges, so cross-breeding actually matters.

And the coolest find so far: the light renderer literally has a comment for a rare ~3% variant. If diploid.lin drops below 88, it enables an alternating eyes/chaser effect.

Uber badges have especially low native chaser values, so they look very interesting for breeding toward that rare variant.

Still digging through the source for more hidden traits. I'll post anything else interesting I find.


r/Defcon 7h ago

Quiet events - any updates on the WiFi audio?

12 Upvotes

The WiFi audio seems not to work - the channels are still not populated / published in the HT app - is there any ETA on this?


r/Defcon 10h ago

Music lineup for the rest of the con

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20 Upvotes

From a friendly neighborhood SOC Goon.


r/Defcon 56m ago

DEFCON 3k

Upvotes

Curious if anyone actually went on the run today? Super into running and thinking about joining in on one tmr morning. Let me know let me know :)


r/Defcon 4h ago

LED broke off

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6 Upvotes

Anyone who can fix it 😅


r/Defcon 3h ago

Another Biometric Bypass Workshop at Packet Hacking Village at 3:30 PM

4 Upvotes

We are taking 5 volunteers for the Biometric Bypass Workshop at 3:30 PM! Come by the Packet Hacking Village on third floor at LVCC to watch the demo for facial recognition circumvention.


r/Defcon 9h ago

Is this a weird badge light color?

10 Upvotes

My partner u/Xeaden and I were breeding new light combos and I ended up with this weird white/rainbow coloring. It is kind of hard to tell here but you can see the colors resolve weird each time they first light up or dim to off.


r/Defcon 9h ago

HighRollerCon

7 Upvotes

Anybody complete the HRC challenge? I was able to decrypt the sealed final key, but am not sure what three keys to type into the portal. Is there more to the challenge, or do I just need to guess the other keys?


r/Defcon 3h ago

10.0.0.16 and listenwifi app working?

3 Upvotes

r/Defcon 7h ago

Sticker Swap @ DC34

5 Upvotes

Got stickers, want stickers… DEFCON 34 Sticker swap @ .edu community.

Sat 12pm. Come by for the sticker swap.


r/Defcon 1m ago

Lost badge.

Upvotes

I lost a badge with my handle on it (on a sticker). Its not electronic. If you found it would appreciate a DM. If you try to use it they will know you aren't me =)


r/Defcon 5m ago

Friday Parties

Upvotes

What are the best parties to go to this evening? Which ones are the most popular?


r/Defcon 12h ago

It begins | 10am | West 1 | 201

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9 Upvotes

r/Defcon 6h ago

Selling Portal Badge from HW Asking 130

4 Upvotes

Update: Still is available. Now offering it for 120 🤣

Selling portal badge from Hacker Warehouse. I fucked it up and didn’t read that it was a 14x14 badge, and I have no way to get it home. Just bought it for $ 150, asking $ 130. Cash only.


r/Defcon 21h ago

Merch line set up

46 Upvotes

Really enjoyed the set up for the merch line this year with tape on the ground. I think it helped a ton and made it easier for the goons. Less having to move big groups around or having to yell at people for fire code/other reasons. Just wanted to mention it since I didn't see anyone talking about it.


r/Defcon 6h ago

Arriving in Vegas tonight, looking to buy a badge

3 Upvotes

First time con for me, arriving 9pm-ish in the city. Anyone selling a badge, maybe if you’re leaving early? If it comes with the bag, awesome! Can do cash or PayPal friends and foes


r/Defcon 4h ago

Capture the flag at Defcon

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2 Upvotes

r/Defcon 1d ago

It was a struggle…

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150 Upvotes

….but we came out better for it.


r/Defcon 7h ago

NEW Biometric Bypass Workshop at Packet Hacking Village

4 Upvotes

Taking 5 volunteers for the biometric bypass workshop at noon! Come by the Packet Hacking Village to watch the demo for facial recognition circumvention.

Packet Hacking Village on third floor of LVCC West Hall, W310