Xeno Kovah
@xenokovah.bsky.social
Interested in reverse engineering, firmware, bluetooth, trusted computing, and training. Founder of OpenSecurityTraining2 https://ost2.fyi
Pinned
Xeno Kovah
@xenokovah.bsky.social
· Aug 9
GitHub - darkmentorllc/bt-re-mad-skillz: LLM Skills for Reverse Engineering Bluetooth Code
LLM Skills for Reverse Engineering Bluetooth Code. Contribute to darkmentorllc/bt-re-mad-skillz development by creating an account on GitHub.
github.com
Slides and BT RE LLM skills from yesterday’s #DEFCON talk are posted here:
github.com/darkmentorll...
github.com/darkmentorll...
github.com/darkmentorll...
github.com/darkmentorll...
I’m out here risking getting my toes chopped off just so you can have cheesy demo videos! It’s called commitment to a bit, look it up!
My talk “When life gives you Bluetooth bugs, make a murderbot! A deeply unserious meditation on stunt-hacking in the AI era...” has been accepted to AVTOKYO www.avtokyo.com in November! Xeno brings the 🧀!
October 7, 2026 at 10:32 AM
I’m out here risking getting my toes chopped off just so you can have cheesy demo videos! It’s called commitment to a bit, look it up!
My talk “When life gives you Bluetooth bugs, make a murderbot! A deeply unserious meditation on stunt-hacking in the AI era...” has been accepted to AVTOKYO www.avtokyo.com in November! Xeno brings the 🧀!
October 7, 2026 at 10:20 AM
My talk “When life gives you Bluetooth bugs, make a murderbot! A deeply unserious meditation on stunt-hacking in the AI era...” has been accepted to AVTOKYO www.avtokyo.com in November! Xeno brings the 🧀!
Nudge nudge, wink wink, knowhatamean, knowhatamean?
Another nudge which we've added to the site is the different tiers of course completion accomplishments. If you complete a class within 2 weeks of starting it you'll get Gold (12.5k points), 4 weeks Silver (6250), 12 weeks Bronze (3125), and > 12 weeks Plain (1250).
October 5, 2026 at 10:35 AM
Nudge nudge, wink wink, knowhatamean, knowhatamean?
Reposted by Xeno Kovah
We've also updated the certificates to match the accomplishment coloring. We hope students will finish classes ASAP after they start them going forward!
October 5, 2026 at 10:30 AM
We've also updated the certificates to match the accomplishment coloring. We hope students will finish classes ASAP after they start them going forward!
Reposted by Xeno Kovah
Another nudge which we've added to the site is the different tiers of course completion accomplishments. If you complete a class within 2 weeks of starting it you'll get Gold (12.5k points), 4 weeks Silver (6250), 12 weeks Bronze (3125), and > 12 weeks Plain (1250).
October 5, 2026 at 10:30 AM
Another nudge which we've added to the site is the different tiers of course completion accomplishments. If you complete a class within 2 weeks of starting it you'll get Gold (12.5k points), 4 weeks Silver (6250), 12 weeks Bronze (3125), and > 12 weeks Plain (1250).
Having listened to Freakonomics' podcast for a long time, I started to appreciate the effect of small nudges and incentives on user behavior. I'm looking forward to seeing how this and similar carrots & sticks in the new gamified world affect student course completion rates.
As part of the gamification we're rolling out a few "Ignominious" badges to nudge users' behavior in the right direction. 🧵
October 3, 2026 at 1:50 PM
Having listened to Freakonomics' podcast for a long time, I started to appreciate the effect of small nudges and incentives on user behavior. I'm looking forward to seeing how this and similar carrots & sticks in the new gamified world affect student course completion rates.
Reposted by Xeno Kovah
As part of the gamification we're rolling out a few "Ignominious" badges to nudge users' behavior in the right direction. 🧵
October 3, 2026 at 12:35 PM
As part of the gamification we're rolling out a few "Ignominious" badges to nudge users' behavior in the right direction. 🧵
Reposted by Xeno Kovah
We scraped our git history to grant the Subtitle Superhero to all the awesome people who've submitted subtitle fixes over the years. If we missed you though, let us know!
October 3, 2026 at 12:48 PM
We scraped our git history to grant the Subtitle Superhero to all the awesome people who've submitted subtitle fixes over the years. If we missed you though, let us know!
Reposted by Xeno Kovah
As a thank you and more public recognition, we've granted this donor badge to the folks who donated in our recent campaign. But if you donated through work or YouTube we can't correlate to your account, so please let us know at donor at ost2.fyi and we'll get that added!
p.ost2.fyi/gamma_dashbo...
p.ost2.fyi/gamma_dashbo...
October 3, 2026 at 1:23 PM
As a thank you and more public recognition, we've granted this donor badge to the folks who donated in our recent campaign. But if you donated through work or YouTube we can't correlate to your account, so please let us know at donor at ost2.fyi and we'll get that added!
p.ost2.fyi/gamma_dashbo...
p.ost2.fyi/gamma_dashbo...
This is “Li’l Stranger”, the new mascot for @opensectraining.bsky.social
- “I’m Xeno and I approve of this message!”
- “I’m Xeno and I approve of this message!”
October 3, 2026 at 12:12 PM
This is “Li’l Stranger”, the new mascot for @opensectraining.bsky.social
- “I’m Xeno and I approve of this message!”
- “I’m Xeno and I approve of this message!”
Reposted by Xeno Kovah
Also now's the time to fill in your profile information so you can show up how you want on the leaderboards! (Putting in your country will then have you show up on the per-country leaderboard.)
October 3, 2026 at 1:34 AM
Also now's the time to fill in your profile information so you can show up how you want on the leaderboards! (Putting in your country will then have you show up on the per-country leaderboard.)
Reposted by Xeno Kovah
The first cut of the new gamified OST2 is available at p.ost2.fyi. Start poking around and let us know what's broken!
October 3, 2026 at 1:22 AM
The first cut of the new gamified OST2 is available at p.ost2.fyi. Start poking around and let us know what's broken!
I have coined a new derogatory term for people who act like they’re taking a big swing but lack the follow-through for it to actually be impactful: “bunters”
October 2, 2026 at 10:34 AM
I have coined a new derogatory term for people who act like they’re taking a big swing but lack the follow-through for it to actually be impactful: “bunters”
Reposted by Xeno Kovah
We have posted the YouTube playlist for "Architecture 1901: From Zero to QEMU" by Antonio Nappa @jeppojeps.bsky.social of Fuzz Society. URLs for offline download can be found here:
www.youtube.com/playlist?lis...
But as always the best experience is at the full class at ost2.fyi/Arch1901.
www.youtube.com/playlist?lis...
But as always the best experience is at the full class at ost2.fyi/Arch1901.
Architecture 1901: From Zero To QEMU - YouTube
View the full free class with labs etc at https://ost2.fyi/Arch1901 ! This class by Antonio Nappa of Fuzz Society (https://fuzzsociety.org/) builds up your k...
www.youtube.com
September 28, 2026 at 11:15 AM
We have posted the YouTube playlist for "Architecture 1901: From Zero to QEMU" by Antonio Nappa @jeppojeps.bsky.social of Fuzz Society. URLs for offline download can be found here:
www.youtube.com/playlist?lis...
But as always the best experience is at the full class at ost2.fyi/Arch1901.
www.youtube.com/playlist?lis...
But as always the best experience is at the full class at ost2.fyi/Arch1901.
Immense thanks to everyone who stepped forward to support #OST2! ❤️ Your generous donations help show that you value providing free high-quality educational material to the world.
September 28, 2026 at 11:02 AM
Immense thanks to everyone who stepped forward to support #OST2! ❤️ Your generous donations help show that you value providing free high-quality educational material to the world.
Reposted by Xeno Kovah
We have posted the YouTube playlist for Trusted Computing 1103: Advanced TPM Usage by Dimi Tomov in partnership with the TCG. Now anyone wishing to download the videos for offline viewing can find all their URLs here:
www.youtube.com/playlist?lis...
But for the full class see ost2.fyi/TC1103
www.youtube.com/playlist?lis...
But for the full class see ost2.fyi/TC1103
Trusted Computing 1103: Advanced TPM Usage - YouTube
View the full free class at https://ost2.fyi/TC1103 ! This is the epic conclusion to the 3-class TPM series (begun in https://ost2.fyi/TC1101 (~8h) and conti...
www.youtube.com
September 25, 2026 at 12:44 PM
We have posted the YouTube playlist for Trusted Computing 1103: Advanced TPM Usage by Dimi Tomov in partnership with the TCG. Now anyone wishing to download the videos for offline viewing can find all their URLs here:
www.youtube.com/playlist?lis...
But for the full class see ost2.fyi/TC1103
www.youtube.com/playlist?lis...
But for the full class see ost2.fyi/TC1103
🧵📈🆙
Low Level PC/Server Attack & Defense Timeline update!
I updated it in July (1st edition using AI help ;)) and forgot to upload/mention it 👇
Low Level PC/Server Attack & Defense Timeline update!
I updated it in July (1st edition using AI help ;)) and forgot to upload/mention it 👇
September 23, 2026 at 11:37 AM
🧵📈🆙
Low Level PC/Server Attack & Defense Timeline update!
I updated it in July (1st edition using AI help ;)) and forgot to upload/mention it 👇
Low Level PC/Server Attack & Defense Timeline update!
I updated it in July (1st edition using AI help ;)) and forgot to upload/mention it 👇
Reposted by Xeno Kovah
All of the videos showing our planned gamification updates to the website are now available in this playlist: www.youtube.com/playlist?lis...
OST2 Gamification Support Fundraiser Public Playlist - YouTube
OST2 is fundraising to support the development and deployment of a gamification system on the main learning site! Donate today to help support OST2! https://...
www.youtube.com
September 21, 2026 at 11:51 AM
All of the videos showing our planned gamification updates to the website are now available in this playlist: www.youtube.com/playlist?lis...
We got too busy to hold any public trainings in 2026, but we're locked in and looking forward to this coming March!
Our next public Bluetooth security training will be at @re-verse.io Mar 14-17, 2027, Orlando, FL shop.binary.ninja/products/re-...
With the addition of our new AI skills for BT RE, it's a whole new world!
With the addition of our new AI skills for BT RE, it's a whole new world!
RE//verse 2027 Training - Bluetooth Low Energy – Full Stack Attack with Xeno & Veronica Kovah
It’s pretty fun to hack things wirelessly! And hey, it turns out there’s literally *billions of Bluetooth Low Energy (BLE) things sold per year, so let’s learn how to hack those! This class is your bo...
shop.binary.ninja
September 21, 2026 at 12:47 PM
We got too busy to hold any public trainings in 2026, but we're locked in and looking forward to this coming March!
People of a certain age remember when people actually got arrested at DEF CON for distributing software. Specifically Dmitry Sklyarov, and specifically that software on the wall ;)
en.wikipedia.org/wiki/United_....
en.wikipedia.org/wiki/United_....
September 21, 2026 at 11:36 AM
People of a certain age remember when people actually got arrested at DEF CON for distributing software. Specifically Dmitry Sklyarov, and specifically that software on the wall ;)
en.wikipedia.org/wiki/United_....
en.wikipedia.org/wiki/United_....
Arbitrary achievement unlocked! "Filling 2 pinboards with badges!"😄
Achieved after this year's @defcon.bsky.social, but I'm hoping that in the future I can also track this achievement via the accomplishments gamification mechanism at #OST2 with all these conferences sponsoring it!🤞🤝😊
Achieved after this year's @defcon.bsky.social, but I'm hoping that in the future I can also track this achievement via the accomplishments gamification mechanism at #OST2 with all these conferences sponsoring it!🤞🤝😊
September 21, 2026 at 11:28 AM
Arbitrary achievement unlocked! "Filling 2 pinboards with badges!"😄
Achieved after this year's @defcon.bsky.social, but I'm hoping that in the future I can also track this achievement via the accomplishments gamification mechanism at #OST2 with all these conferences sponsoring it!🤞🤝😊
Achieved after this year's @defcon.bsky.social, but I'm hoping that in the future I can also track this achievement via the accomplishments gamification mechanism at #OST2 with all these conferences sponsoring it!🤞🤝😊
Also as a reminder, if you're in the US and your company supports donation matching to nonprofits, you can double your donation by using your corporate donation portal! 🤩 Just look for “OpenSecurityTraining Inc.” (our formal registered nonprofit name)
Thanks to all the donors who put us over $1500 in donations so far for our first ever fundraiser!
But we know there are thousands of other students & well-wishers waiting in the wings. If our true fans donated just $5 today we'd quickly double that total! www.every.org/ost2/f/lets-...
But we know there are thousands of other students & well-wishers waiting in the wings. If our true fans donated just $5 today we'd quickly double that total! www.every.org/ost2/f/lets-...
September 21, 2026 at 11:05 AM
Also as a reminder, if you're in the US and your company supports donation matching to nonprofits, you can double your donation by using your corporate donation portal! 🤩 Just look for “OpenSecurityTraining Inc.” (our formal registered nonprofit name)
Thanks to all the donors who put us over $1500 in donations so far for our first ever fundraiser!
But we know there are thousands of other students & well-wishers waiting in the wings. If our true fans donated just $5 today we'd quickly double that total! www.every.org/ost2/f/lets-...
But we know there are thousands of other students & well-wishers waiting in the wings. If our true fans donated just $5 today we'd quickly double that total! www.every.org/ost2/f/lets-...
September 21, 2026 at 11:05 AM
Thanks to all the donors who put us over $1500 in donations so far for our first ever fundraiser!
But we know there are thousands of other students & well-wishers waiting in the wings. If our true fans donated just $5 today we'd quickly double that total! www.every.org/ost2/f/lets-...
But we know there are thousands of other students & well-wishers waiting in the wings. If our true fans donated just $5 today we'd quickly double that total! www.every.org/ost2/f/lets-...
Reposted by Xeno Kovah
Donations don't need to be large! Many hands make light work and we'd love to see how many people support what we do!🙏
And if you've got an idea for an OST2 class, reach out at teach🌀ost2.fyi! We've got many instructors who are working on classes, and we'd love to add your class to the queue too!
And if you've got an idea for an OST2 class, reach out at teach🌀ost2.fyi! We've got many instructors who are working on classes, and we'd love to add your class to the queue too!
September 18, 2026 at 10:53 AM
Donations don't need to be large! Many hands make light work and we'd love to see how many people support what we do!🙏
And if you've got an idea for an OST2 class, reach out at teach🌀ost2.fyi! We've got many instructors who are working on classes, and we'd love to add your class to the queue too!
And if you've got an idea for an OST2 class, reach out at teach🌀ost2.fyi! We've got many instructors who are working on classes, and we'd love to add your class to the queue too!
Reposted by Xeno Kovah
🎮Our gamification fundraiser ends next week but we need your support today!🕹️
www.every.org/ost2/f/lets-...
In this penultimate video @xenokovah.bsky.social talks about how the gamification will allow us to recognize the ultimate volunteers, the instructors!
www.every.org/ost2/f/lets-...
In this penultimate video @xenokovah.bsky.social talks about how the gamification will allow us to recognize the ultimate volunteers, the instructors!
September 18, 2026 at 10:53 AM
🎮Our gamification fundraiser ends next week but we need your support today!🕹️
www.every.org/ost2/f/lets-...
In this penultimate video @xenokovah.bsky.social talks about how the gamification will allow us to recognize the ultimate volunteers, the instructors!
www.every.org/ost2/f/lets-...
In this penultimate video @xenokovah.bsky.social talks about how the gamification will allow us to recognize the ultimate volunteers, the instructors!