OpenSecurityTraining2
@opensectraining.bsky.social
501(c)(3) Nonprofit providing Open Source and Open Access computer security training material. #OST2 re-launched July 2021!
Pinned
OST2 Gamification Fundraiser: Video 1: Gamification Overview
YouTube video by OpenSecurityTraining2
www.youtube.com
🎮We're running a 1-month fundraiser and need your support to gamify OST2!🕹️
www.youtube.com/watch?v=hu46...
Check out the above video for our plans, and then please donate here to support this effort: www.every.org/ost2/f/lets-...
More videos with more details coming all this month!
www.youtube.com/watch?v=hu46...
Check out the above video for our plans, and then please donate here to support this effort: www.every.org/ost2/f/lets-...
More videos with more details coming all this month!
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
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...
Part 2 for devs! UAFs, race conditions, type confusion & info leaks. Real 0day exploit walkthroughs show why "looks unexploitable" are famous last words. Secure Development 1002 ost2.fyi/SecDev1002 by @xenokovah.bsky.social
September 21, 2026 at 11:12 AM
Part 2 for devs! UAFs, race conditions, type confusion & info leaks. Real 0day exploit walkthroughs show why "looks unexploitable" are famous last words. Secure Development 1002 ost2.fyi/SecDev1002 by @xenokovah.bsky.social
In this final video @xenokovah.bsky.social talks about how the gamification system will allow us to recognize other worthwhile achievements outside of the platform, such as speaking at security conferences!
🎮This is the last week of the OST2 gamification fundraiser! If you were waiting to be a last-minute hero, now is the time to swoop in!🕹️
www.every.org/ost2/f/lets-...
www.every.org/ost2/f/lets-...
September 21, 2026 at 10:49 AM
In this final video @xenokovah.bsky.social talks about how the gamification system will allow us to recognize other worthwhile achievements outside of the platform, such as speaking at security conferences!
🎮This is the last week of the OST2 gamification fundraiser! If you were waiting to be a last-minute hero, now is the time to swoop in!🕹️
www.every.org/ost2/f/lets-...
www.every.org/ost2/f/lets-...
September 21, 2026 at 10:48 AM
🎮This is the last week of the OST2 gamification fundraiser! If you were waiting to be a last-minute hero, now is the time to swoop in!🕹️
www.every.org/ost2/f/lets-...
www.every.org/ost2/f/lets-...
The best defense is understanding the offense. Learn to spot and prevent the C/C++ implementation bugs that attackers love to exploit. Secure Development 1001 by @xenokovah.bsky.social at ost2.fyi/SecDev1001
Secure Development 1001: C-Family Implementation Vulnerabilities 1
Secure Development 1001: C-Family Implementation Vulnerabilities 1
ost2.fyi
September 18, 2026 at 11:05 AM
The best defense is understanding the offense. Learn to spot and prevent the C/C++ implementation bugs that attackers love to exploit. Secure Development 1001 by @xenokovah.bsky.social at ost2.fyi/SecDev1001
🎮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!
Reposted by OpenSecurityTraining2
I’ve been looking for a way to recognize #OST2 volunteers more publicly, and this will allow them to stand head and shoulders above other OST2 students and claim their rightful place of honor! Only the instructors and potentially hardcore class-completionists will shine brighter!
🎮Our gamification fundraiser ends soon and we need your support!🕹️
www.every.org/ost2/f/lets-...
Here @xenokovah.bsky.social talks about how the gamification will allow us to recognize the volunteers who make classes better through beta testing, subtitle correction, graphics contributions, etc!
www.every.org/ost2/f/lets-...
Here @xenokovah.bsky.social talks about how the gamification will allow us to recognize the volunteers who make classes better through beta testing, subtitle correction, graphics contributions, etc!
September 14, 2026 at 11:05 AM
I’ve been looking for a way to recognize #OST2 volunteers more publicly, and this will allow them to stand head and shoulders above other OST2 students and claim their rightful place of honor! Only the instructors and potentially hardcore class-completionists will shine brighter!
🎮Our gamification fundraiser ends soon and we need your support!🕹️
www.every.org/ost2/f/lets-...
Here @xenokovah.bsky.social talks about how the gamification will allow us to recognize the volunteers who make classes better through beta testing, subtitle correction, graphics contributions, etc!
www.every.org/ost2/f/lets-...
Here @xenokovah.bsky.social talks about how the gamification will allow us to recognize the volunteers who make classes better through beta testing, subtitle correction, graphics contributions, etc!
September 14, 2026 at 10:52 AM
🎮Our gamification fundraiser ends soon and we need your support!🕹️
www.every.org/ost2/f/lets-...
Here @xenokovah.bsky.social talks about how the gamification will allow us to recognize the volunteers who make classes better through beta testing, subtitle correction, graphics contributions, etc!
www.every.org/ost2/f/lets-...
Here @xenokovah.bsky.social talks about how the gamification will allow us to recognize the volunteers who make classes better through beta testing, subtitle correction, graphics contributions, etc!
Build the ultimate Windows kernel debugging setup! Automated VMs, ret-sync with IDA/Ghidra, and source-level kernel debugging. Your exploit lab for Cedric Halbronn's classes awaits! Debuggers 3011: Advanced WinDbg ost2.fyi/Dbg3011
Debuggers 3011: Advanced WinDbg
Debuggers 3011: Advanced WinDbg
ost2.fyi
September 11, 2026 at 10:25 AM
Build the ultimate Windows kernel debugging setup! Automated VMs, ret-sync with IDA/Ghidra, and source-level kernel debugging. Your exploit lab for Cedric Halbronn's classes awaits! Debuggers 3011: Advanced WinDbg ost2.fyi/Dbg3011
🎮In the 6th video in our fundraiser, @XenoKovah talks about how student profiles would become much more useful with gamification!🕹️
🧵
🧵
September 11, 2026 at 10:23 AM
🎮In the 6th video in our fundraiser, @XenoKovah talks about how student profiles would become much more useful with gamification!🕹️
🧵
🧵
Want to write kernel exploits or analyze malware? You need to understand Windows internals first. Syscalls, IRQL, pools, mitigations & more. Architecture 2821: Windows Kernel Internals 2 by Cedric Halbronn ost2.fyi/Arch2821
Architecture 2821: Windows Kernel Internals 2
Architecture 2821: Windows Kernel Internals 2
ost2.fyi
September 7, 2026 at 10:42 AM
Want to write kernel exploits or analyze malware? You need to understand Windows internals first. Syscalls, IRQL, pools, mitigations & more. Architecture 2821: Windows Kernel Internals 2 by Cedric Halbronn ost2.fyi/Arch2821
Reposted by OpenSecurityTraining2
I think inter/intra-country leaderboards will drive some fun inter/intra-country competition. E.g. here’s who’s been active on OST2 in the last 30 minutes (it’s currently too-early-to-be-up-o’clock on a holiday in the US ;)). But which country has the TOP students?!
September 7, 2026 at 10:28 AM
I think inter/intra-country leaderboards will drive some fun inter/intra-country competition. E.g. here’s who’s been active on OST2 in the last 30 minutes (it’s currently too-early-to-be-up-o’clock on a holiday in the US ;)). But which country has the TOP students?!
🎮In the 5th video in our gamification fundraiser, @xenokovah.bsky.social talks about how leaderboards will work!🕹️
We will have a bunch of different leaderboards: global for the entire site, per-country, per-class, per-accomplishment, and possibly more!
youtu.be/sJEFw-e1iao
We will have a bunch of different leaderboards: global for the entire site, per-country, per-class, per-accomplishment, and possibly more!
youtu.be/sJEFw-e1iao
OST2 Gamification Fundraiser: Video 5: Leaderboards
YouTube video by OpenSecurityTraining2
youtu.be
September 7, 2026 at 10:22 AM
🎮In the 5th video in our gamification fundraiser, @xenokovah.bsky.social talks about how leaderboards will work!🕹️
We will have a bunch of different leaderboards: global for the entire site, per-country, per-class, per-accomplishment, and possibly more!
youtu.be/sJEFw-e1iao
We will have a bunch of different leaderboards: global for the entire site, per-country, per-class, per-accomplishment, and possibly more!
youtu.be/sJEFw-e1iao
🎮In the 4th video in our gamification fundraiser, @xenokovah.bsky.social talks about how we can track intra-class accomplishments!🕹️
Remember, OST2 isn't a mega-nonprofit, we really do need *your* support to keep the ball rolling! www.every.org/ost2/f/lets-... 🙏
Remember, OST2 isn't a mega-nonprofit, we really do need *your* support to keep the ball rolling! www.every.org/ost2/f/lets-... 🙏
www.every.org
September 4, 2026 at 10:50 AM
🎮In the 4th video in our gamification fundraiser, @xenokovah.bsky.social talks about how we can track intra-class accomplishments!🕹️
Remember, OST2 isn't a mega-nonprofit, we really do need *your* support to keep the ball rolling! www.every.org/ost2/f/lets-... 🙏
Remember, OST2 isn't a mega-nonprofit, we really do need *your* support to keep the ball rolling! www.every.org/ost2/f/lets-... 🙏
Learn Intel Simics: the full-system simulator that lets you debug *everything*, even firmware. Essential prep for the firmware attack & defense class. Debuggers 1015: Introductory Simics ost2.fyi/Dbg1015
Debuggers 1015: Introductory Simics
Debuggers 1015: Introductory Simics
ost2.fyi
August 31, 2026 at 10:10 AM
Learn Intel Simics: the full-system simulator that lets you debug *everything*, even firmware. Essential prep for the firmware attack & defense class. Debuggers 1015: Introductory Simics ost2.fyi/Dbg1015
🎮In this video in our gamification fundraiser @xenokovah.bsky.social talks about how multi-class completion accomplishments will work!🕹️
We super appreciate everyone who's donated thus far, but we need everyone who can to show their support for #OST2! www.every.org/ost2/f/lets-... 🙏
We super appreciate everyone who's donated thus far, but we need everyone who can to show their support for #OST2! www.every.org/ost2/f/lets-... 🙏
August 31, 2026 at 9:58 AM
🎮In this video in our gamification fundraiser @xenokovah.bsky.social talks about how multi-class completion accomplishments will work!🕹️
We super appreciate everyone who's donated thus far, but we need everyone who can to show their support for #OST2! www.every.org/ost2/f/lets-... 🙏
We super appreciate everyone who's donated thus far, but we need everyone who can to show their support for #OST2! www.every.org/ost2/f/lets-... 🙏
🎮For the next video in our gamification fundraiser let's talk about how per-class completion accomplishments will work!🕹️
youtu.be/DnffPQQo2QQ
Please support OST2 if you can! 🙏
www.every.org/ost2/f/lets-...
youtu.be/DnffPQQo2QQ
Please support OST2 if you can! 🙏
www.every.org/ost2/f/lets-...
OST2 Gamification Fundraiser: Video 2: Class-Completion Accomplishments
YouTube video by OpenSecurityTraining2
youtu.be
August 28, 2026 at 9:44 AM
🎮For the next video in our gamification fundraiser let's talk about how per-class completion accomplishments will work!🕹️
youtu.be/DnffPQQo2QQ
Please support OST2 if you can! 🙏
www.every.org/ost2/f/lets-...
youtu.be/DnffPQQo2QQ
Please support OST2 if you can! 🙏
www.every.org/ost2/f/lets-...
Note that www.every.org/ost2/f/lets-... supports crypto donations in case you've got some crypto burning a hole in your wallet ;)
August 26, 2026 at 11:28 AM
Note that www.every.org/ost2/f/lets-... supports crypto donations in case you've got some crypto burning a hole in your wallet ;)
🎮We're running a 1-month fundraiser and need your support to gamify OST2!🕹️
www.youtube.com/watch?v=hu46...
Check out the above video for our plans, and then please donate here to support this effort: www.every.org/ost2/f/lets-...
More videos with more details coming all this month!
www.youtube.com/watch?v=hu46...
Check out the above video for our plans, and then please donate here to support this effort: www.every.org/ost2/f/lets-...
More videos with more details coming all this month!
OST2 Gamification Fundraiser: Video 1: Gamification Overview
YouTube video by OpenSecurityTraining2
www.youtube.com
August 23, 2026 at 10:43 PM
🎮We're running a 1-month fundraiser and need your support to gamify OST2!🕹️
www.youtube.com/watch?v=hu46...
Check out the above video for our plans, and then please donate here to support this effort: www.every.org/ost2/f/lets-...
More videos with more details coming all this month!
www.youtube.com/watch?v=hu46...
Check out the above video for our plans, and then please donate here to support this effort: www.every.org/ost2/f/lets-...
More videos with more details coming all this month!
Sniff the airwaves! Learn BT recon with Blue2thprinting; identify devices, detect known vulns & crowdsource data via BTIDALPOOL. Bluetooth 2222: Bluetooth Reconnaissance with Blue2thprinting by @xenokovah.bsky.social
ost2.fyi/BT2222 (~8.5 hrs)
ost2.fyi/BT2222 (~8.5 hrs)
Bluetooth 2222: Bluetooth reconnaissance with Blue2thprinting
Bluetooth 2222: Bluetooth reconnaissance with Blue2thprinting
ost2.fyi
July 27, 2026 at 12:38 PM
Sniff the airwaves! Learn BT recon with Blue2thprinting; identify devices, detect known vulns & crowdsource data via BTIDALPOOL. Bluetooth 2222: Bluetooth Reconnaissance with Blue2thprinting by @xenokovah.bsky.social
ost2.fyi/BT2222 (~8.5 hrs)
ost2.fyi/BT2222 (~8.5 hrs)
Reposted by OpenSecurityTraining2
Reposted by OpenSecurityTraining2
🥳 #OST2_5th_Anniversary 🎉
Check out #OST2_5th_Anniversary to join our celebration and see what happened this past year!
Check out #OST2_5th_Anniversary to join our celebration and see what happened this past year!
July 17, 2026 at 2:15 PM
🥳 #OST2_5th_Anniversary 🎉
Check out #OST2_5th_Anniversary to join our celebration and see what happened this past year!
Check out #OST2_5th_Anniversary to join our celebration and see what happened this past year!
🥳 #OST2_5th_Anniversary🎉
OST2 is made possible by instructors who want to help other security engineers learn skills faster. So what we'd really like to see for this coming year are more instructors teaching more diverse topic areas. If you 🫵 have an idea for a class, reach out at teach at ost2.fyi!
OST2 is made possible by instructors who want to help other security engineers learn skills faster. So what we'd really like to see for this coming year are more instructors teaching more diverse topic areas. If you 🫵 have an idea for a class, reach out at teach at ost2.fyi!
OpenSecurityTraining2
Free, deep-dive computer security training: x86 and RISC-V assembly, reverse engineering, exploitation, firmware, debuggers, and trusted computing. All
course materials are open-source under Creative...
ost2.fyi
July 17, 2026 at 2:26 PM
🥳 #OST2_5th_Anniversary🎉
OST2 is made possible by instructors who want to help other security engineers learn skills faster. So what we'd really like to see for this coming year are more instructors teaching more diverse topic areas. If you 🫵 have an idea for a class, reach out at teach at ost2.fyi!
OST2 is made possible by instructors who want to help other security engineers learn skills faster. So what we'd really like to see for this coming year are more instructors teaching more diverse topic areas. If you 🫵 have an idea for a class, reach out at teach at ost2.fyi!
July 17, 2026 at 2:25 PM