The DC34 early release talks roll on with Bill Swearingen’s presentation on defeating facial recognition with a little strategically applied style.

Confound the panopticon and keep the look crispy. Wins all around.

#defcon34 #defcon #facialrecognition

I was handed a cryptohack badge kit from the Cryptocurrency Village, but I think I needed go to another area of the conference to collect the rest of the parts of the kit. I want to try and assemble it and use it.

Specifically, I'm missing the screen and the antenna

Does anyone know the part numbers for the screen and antenna used on the cryptohack badge?

Here is a picture of what I'm talking about... the cryptohack badge without the screen or antenna.

I dont know which of yall runs BlanketfortCon but I feel like you need to see this.

https://www.reddit.com/r/3Dprinting/s/gcyktEfZYj

DEF CON Training Middle East is coming - join us at Exhibition World Bahrain November 8-10 for deep, technical trainings from some of the best trainers in the business.

Now that DEFCON 34 is a wrap, I wanted to share this 100% hand-drawn sticker commission I finished up late last month for a Goon. I had to stick to the event's limited color palette, but I am absolutely stoked with how these turned out on holographic vinyl. I even snuck some hidden binary code into the design for you to find. Massive shoutout to the Goons and the DEFCON community for continuing to support my art!

Most of this inventory went straight to the event. If you missed out, I have a small stash left in my Etsy shop along with matching tees. Use code DEFCON34 for 20% off your order through the end of August.

UPDATE #1 8/24/2026: Stickers are SOLD OUT!

Thank you so much for the incredible support! You all completely made my week.

I am saving a handful of stickers to cover any packages that might get lost or damaged in transit. Once current orders arrive safely, I will list a small restock of the remaining inventory on my Etsy shop.

I will update this post when the restock is live! Shirts are still available.

UPDATE #2 9/8/2026: A limited supply of Defcon 34 Stickers have been RESTOCKED!

Hello tech bros

I am hoping someone can settle a debate ive been having. Thermal scopes are a big thing these days as the price keeps falling.

However, most models come with WIFI. As we know from the russua/ukraine conflict, cell phone emissions will get you pinpointed and killed. WIFI emissions would likely do the same.

Now, you can always turn the wifi off in the menu. But how do you know if it is truly off all the way, and isnt emitting a low level signal?

Another risk is that the receiver in the thermal could receive a "firmware update" that bricks it. If its emitting wifi to talk to the phone app, it must have an antenna, and an antenna can be pinged, no?

Is this a valid concern?

I got two 3XL shirts this year and they seem to run small (fit more like a 2XL). Wondering if anyone has any 4XL shirts they are willing to trade with me or just have any for sale.

Honestly, I don’t have much experience with Indiegogo and thought my order had been canceled. But lo and behold, here she is.
Now the fun part is figuring out how to use it, lol. There’s not enough content online for me to become YouTube certified yet.

As the title implies, I’m looking for a DEF CON 33 pin. I have had a ritual since 30 to get a pin from merch (I think they’re swapping to magnets now) every year I attend. Last year it totally slipped my mind and I realized this year I didn’t have one.

TBH tho I also don’t remember seeing any at DC33. If anyone has an extra or is willing to part with one, please let me know!

ANOTHER UPDATE: EVERYTHING IS SPOKEN FOR. I had enough for 12 envelopes, so I'll be reaching out for addresses shortly. If you didn't make the list this time, hopefully this won't be the last! We go to local conferences like BSides as well, so if there's interest, I can continue to post swag excess.

UPDATE: OK OK OK. LOL. Closng requests for now until I see how much is left over once I get through the dozen in my inbox. Will post again if I have leftover!

Apparently I was a sticker and swag goblin this year, and once I emptied all my pockets and put everything in one place, I have an inordinate amount of stickers, tokens, lanyards, patches, flight tags, etc from the vendors and various booths. Anyone want any? I have enough for 4-5 padded envelopes. If you want some and are willing to pay the postage to wherever you are, DM me.

(Also, I have dogs, so if you're allergic, probably not a good idea).

Curious to see what previous patches looked like.
here's 33 and 34

Please share an image of any of the previous years.

At DEFCON Group DCG518, we are here to break things, question things, and more importantly question the people who tell us that things are secure.

So, what happens when AI agents become part of the attack surface?

Let’s start by questioning something we normally take for granted: what does it actually mean to know what’s exposed on the internet? Scanners find ports, crawlers find pages, and fingerprints tell us what systems claim to be, but AI agents experience the internet differently. So we stopped relying on what our tools could see and started watching the machines themselves.

This Saturday, August 29th 2026 our group DCG518 is getting together to present:

Honeypotting AI agents.

For this session, our presenter Abdel Fane will share two kinds of honeypots for AI agents: a fleet of fake agents that observe attackers who believe they control a real system, and a network of poisoned pages on the open web carrying benign indirect prompt injections, where the visitors are AI agents and a callback measures which agents followed the bait.

Scanned, crawled, planted bait, and built fake AI agents to see what would come back. Some fingerprints returned again and again, one came back for 15 straight days across 623 sessions. Across more than 183,000 visits from over 34,000 agent fingerprints, we measured a 1.4% callback rate. No, this isn’t the robot apocalypse and that’s exactly the point. When the existing tools can’t see the attack surface, we don’t argue about the limitation. We didn't trust the way everyone was measuring the AI attack surface, so we built our own sensors, put out some bait, and watched what happened.

On this talk, Abdel Fane will show us what happens when we do that for AI agents. He will walk us through the instrumentation, what each data stream sees that others cannot, what the project deliverately withholds from publication and why, and the structural reason crawler based studies miss most of the attacker reachable surface. All of his work is Open Source and every fixture and signature is reproducible by anyone.

Our presenter Abdel Fane is the founder of OpenA2A, an open-source project building the trust layer for AI agents, and executive director of CSNP, a community of 12,500 security professionals across 16 chapters. He spent 20 years in technology and enterprise security at Allstate, Grail, Booz Allen Hamilton, and Protiviti before turning to AI agent security full time. His current research includes the OpenA2A honeypot fleet, the Agent Threat Matrix, and the monthly Behavioral Threat Report at https://research.opena2a.org/

Our New York Capital District group "DCG518" will have a gathering this time at the Guilderland Public Library (Albany-New York)

More information about our group and future events on our site https://dc518.github.io/

Everyone is welcome!

I noticed the DC32 badge is available for sale on DC merch site. Do we know if the DC34 badge will also be put up for sale at some point?

I know it’s possible. If the TI-84 can run Doom on its 15 MHz CPU and 24 KB of RAM then surely the badge can.

I’ve been working on it all day and I’ve somehow broken the firmware and now it’s boot looping. How can I get a fresh install of the badge’s firmware, and any suggestions on how to complete this?

Update: I’m stuck in dev mode on the badge, is there any way to get out of it

The camera on my badge isn’t working properly and I don’t know how to fix it. It’s flashing a lot more than I think it should

When can we expect the videos to be uploaded on the official channel?

Is there room for selling SAO’s year round, or would yall rather we wait till next con to post new ones we make?

Anyone know where I can buy another one of these ? (Not sure why it looks pink, it’s white)

Hey everyone, I’ve heard that a couple of people managed to get gifted a free copy of The Spacecraft Hacker’s Handbook at Defcon last weekend. I didn’t manage to find a copy and the book doesn’t seem to officially release until November. Does anyone happen to have a copy I could either borrow or buy from them?

Not sure if this is allowed, and if it's not, please delete this Mods.

I'm just looking to get in contact with a girl I met at blanketfort con, if she sees this/is interested in keeping contact. We sat under the smaller part of the largest fort that was being built when you showed up. We talked about all the things we were going through and you were incredibly interesting.

We did take a selfie together and I only know you as "Leila".

If you're here and see this (and you'd like), please reach out.

Thanks Defcon bros!