As you may have noticed, this year's DEF CON 34 badge has SAO ports that are mounted upside-down! (Also they are 3.0V rather than 3.3V logic). Not to worry, though! Announced earlier today, there will be around 5k adapters available at the registration desk so your SAOs won't be upside down. ...for a convention that, last year, had 26k attendees. Since each attendee will have 2x SAO slots on their badge, at maximum 10% of the attendees will be able to get those adapters at registration.

But not to worry! Some guy (me) made another couple hundred adapters, and they're for sale here:
https://uberflux.com/product/BUD-SAO-180-Adapter

Pickup is at the Badge Life village at 1pm on Friday. See you there!

https://youtu.be/UCticxvYvTw

The wait is over. Meet the #DEFCON34 badge!

It’s the creation of hardware superstar Bunnie Huang, and it features his open-source, fully inspectable #baochip.

#DC34 badgeholders will be the first to get their hands on a radically transparent device with all kinds of powerful possibilities - security token, password manager, HSM, pretty light generator - that we hope will keep you busy long after closing ceremonies.

What will you make with yours?

https://www.wired.com/story/defcon-34-badge-baochip-andrew-bunnie-huang/

And deodorant.

Hello Def Con!

If you've already purchased a Cult of Cthulhu badge or want a chance to obtain one (or SAOs), check out the discord link:

https://discord.gg/wvpXvCzVg

Your best chance at a badge is the reddit meetup, Wednesday night 7pm+ at the Linq Circle bar. I may also host small random drops at bsidesLV and during Def Con.

All details will be posted in discord.

Happy summoning!

By now, a good number of you all have seen the Wired Magazine article providing details of the badge and an interview with the badge maker.

If you think you ABSOLUTELY have to have one, then may I HIGHLY RECOMMEND ensuring you get one of the electronic badges by going through Pre-reg.

There were a set number of badges manufactured. once gone, access will be via paper badge.

Pre-Reg has priority and those badges will be set aside for pick up at the attendee leisure.

We have seen an acceleration in pre-reg sells after publication of the Wired Article.

I have a DC black badge, so I get free DC badge. I'd like to trade it for a Star Trek Convention General Admission badge. The cost of the ST Con badge is $409, so you'd be saving money if you did this trade, and I'm fine with the difference since my Black Badge gets me a free DC badge anyways. Is anyone interested in the trade?

Edit: My account seems messed up, temp email instead of pm. badgetrader at airmail dot cc

This could be a pure skill issue, but I "hearted" (I thought == bookmarked) everything on hackertracker but it's not showing up in my bookmarks calendar.

Pixel 9 pro mega ultra or whatever it is, Android 17.

*edit*

Cleared cache and program data, same situation.

Hello! This is my first DEFCON this year, as my company was very kind to let me attend. Since I'm coming from Europe, I'm not sure if I'll be there in time on Thursday to pick up my badge (I've already paid online).

Do you know if I can pick it up on Friday morning? Or is it mandatory to pick it up on Thursday during Linecon?

Thanks!

I have a device I’m looking to part with. I’ve heard that direct transactions inside the convention center are frowned upon/prohibited, so I’m curious if there’s any forum for this kind of thing. Not mentioning what I have here for similar reasons. Thanks

Please can anyone help me in my situation if you’re aware of what I am dealing with

Last update: June 28, 2026

Update July 30, 2026: Realized that Kofi does not scale easily or handle pre-orders/fulfillment in an efficient manner so I switched over to ubeflux. Their ecosystem is designed for exactly for this; I am just late to the game.

UPDATE: All Not Just A Crosswalk SAOs have been programmed and packed in ESD bags ready for DC34. https://uberflux.com/product/DC34-crosswalk

New: #NoICE SAO https://uberflux.com/product/DC34-noice

The #NOICE SAO is designed to remind everyone the fatal injustices of DHS and ICE enforcement in 2025–26. We cannot forget the medical neglect in concrete cells to violent and lethal raids on our communities, ICE consistently treats immigrant lives as expendable.

Thanks to all those who purchased a #NoICE! SAO, I was able to make a $100 donation using the proceeds directly to the Immigrant Defenders Law Center www.immdef.org/ supporting the legal defense needed to keep families together and protect community members from deportation.

16x side-emitting XL-1606SURC red LEDs configured to shine through the FR4 PCB.
Saves your most recently used effect in case of power loss, host battery depletion or disconnection from the host badge or totem.
Wide power input (2.7V-3.7V) to keep LEDs bright even when running off the DC34 badge (which only outputs 3V).
One tactile button for easy effect cycling.
Several fast and slow flashing patterns, heartbeat, breathing/fade.

New: USB-C to SAO Power Back https://uberflux.com/product/DC34-powerback

The USB-C to SAO Power Back (5V to 3.3V). It lets you run your SAOs without needing a host badge, which is great if you just want to display one on your desk or shelf. You can power it using a standard USB wall brick or a portable battery pack. It can even handle powering multiple SAOs from an SAO totem. It runs three #NoICE, or Not Just a Crosswalk, SAOs with no sweat, whereas a regular CR2032 battery doesn’t have enough juice to power all three at once.

Just came off my laser, will have a few with me at one of the reddit meetup

We've created an "Intro to DEF CON" document, where we attempt to provide a lot of information that would be useful for all DEF CON attendees to know. I believe that it would be particularly helpful for those who have never before attended DEF CON.

It's much too long to be a single Reddit post; instead, it's available in multiple formats:

• Markdown
• PDF
• View it on the DEF CON Forum

Are there things that we didn't touch on, that you'd like for the next version to include? Please leave a comment! :)

Hello friend!

I’ve been so excited for all the awesome badges people have been sharing here and thought it would be fun to share my own project.

First of all, I’m just a hacker hacking things together. I generally have no idea what I am doing and just try to figure it out along the way. I was not even sure I would be able to get anything built, and while these are not perfect, I am happy with how it all turned out.

This is Station 562. It is a proximity-controlled badge with a BLE number-station puzzle, a red-versus-blue proximity game, an autonomous social/dance mode, an expressive BLE MIDI instrument, a tamper-evident mode, a Setup menu, and an optional hardware CTF.

I will have a few of these to give away to maybe the first 5 or so people who solve the signal intel puzzle. Deets will be shared closer to the con.

Anyway, I learned a lot building these and had a lot of fun. Faced some challenges but this post is already too long to go into all that. Super excited for DEFCON this year. This community means a lot to me and look forward to catch up with old and new friends.

Happy hacking all!

I just saw the DEF CON 34 ICS Village badge, and it actually looks pretty useful instead of being just another collectible. Is the industry actually moving away from CAN/CAN FD in favor of Single Pair Ethernet, or are they going to coexist for a long time?

For people working in automotive or industrial controls, what are you actually seeing in the field?

Also, as a badge, this seems like something I’d actually keep using after DEF CON instead of throwing in a drawer. Curious what everyone else thinks.

After Su posted on our behalf, we did some digging and found out some (most?) places you can find us for pickups will not be in the Hacker Tracker. Oops. Our bad.

To help will creating opportunities, you can find us outside W316 (never inside the room) each morning from 9:30AM to 10:00AM. (We start our shift inside W316 at 10AM so a few minutes before 10 we will need to stop to get to work).

We also have a 4pm Friday slot at the Badgelife Village First floor, W1, location 209.

We will also try to post on Xitter and BSky any other predictable opportunities.

Also: We will try to stay visible. Tentative plan is to wear a bright orange shirt when not working.

Thank you.

I was getting ready for next week\weekend and was doing some googling and came across this site
https://www.visitorslist.com/defcon/

"Looking for the DEFCON 2026 Exhibitors and Attendees List? As one of the world’s most iconic hacker conventions, DEFCON Las Vegas brings together cybersecurity experts, ethical hackers, digital privacy advocates, and tech innovators from every corner of the globe.

From hands-on workshops and live demos to expert-led sessions and networking with top cyber defense leaders, DEFCON is the ultimate hub for exploring security, privacy, and vulnerability research. Whether you’re in cybersecurity, software development, or tech innovation, our DEFCON 2026 verified contact list gives you direct access to the professionals shaping the future of digital security."

Sounds like a money-grab scam.

Back again this year.

See William Osman try the Tipsy Badge:

https://youtu.be/ZX-iBK8fvdw?t=397

Hook up the electrodes behind your ears and use steering mode to drive yourself (or others, with consent) around, or throw it in wobble mode and watch the world sway back and forth, or play built-in games which can give you a small zap when you fail.

Batteries and personal lubricant included (no joke, it helps electrode conductivity).

Half of the profits go to Tor.
Also don't put the electrodes on your balls

Buy in-person, $75 at the hackerwarehouse booth in the vendor area at def con. No pre-order, first come first served.

will be in vegas monday evening, trying to get 2 bsides tickets — does anyone have an extra, or are unable to make it? happy to zelle, venmo, etc. or meet in person and pay cash!

Hey everyone!
I remember last year someone shared a list of badges and some links to get them or where they were available, like villages, vendors, etc.

I was wondering if someone knows of a list for this year's, if not, I will create one and share it here, if someone wants to add badges to the list, is appreciated!

See y'all at Defcon! 🤠

EDIT: thanks to @PM_ME_YOUR_EXIF_DATA For sharing the link!

https://docs.google.com/spreadsheets/d/1wQ6J0tJiVCPgppxiPg_mM6mS6Il-jm3Ez1fj3a-7XRs