Open Security Conference
@opensecurityconf.bsky.social
Welcome to the official account of the Open Security Conference (#osco), the people-centred international gathering for everyone interested in cybersecurity.
https://opensecurityconference.org/
https://opensecurityconference.org/
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Welcome to the Open Security Conference (osco), the people-centred international gathering for everyone interested in cybersecurity. Join us 2-5 October 2025 in Rückersbach, Germany.
opensecurityconference.org
Yes. Yes, you've seen correctly. There's going to be an Open Security Conference 2026! 😍
🗓 Save the dates: November 5-8, 2026. ✅
opensecurityconference.org
#osco #osco26 #CyberSecurity #Security #InfoSec #AppSec #ProductSecurity #OTsecurity #OpenSpace [lisi]
🗓 Save the dates: November 5-8, 2026. ✅
opensecurityconference.org
#osco #osco26 #CyberSecurity #Security #InfoSec #AppSec #ProductSecurity #OTsecurity #OpenSpace [lisi]
Reposted by Open Security Conference
second time's already the charm | A Tester's Journey: Open Security Conference 2025 - Marvelous Momentum www.lisihocke.com/2025/10/open... #osco #osco25
Open Security Conference 2025 - Marvelous Momentum
A blog about learning, agile product development and software testing.
www.lisihocke.com
October 13, 2025 at 10:24 PM
second time's already the charm | A Tester's Journey: Open Security Conference 2025 - Marvelous Momentum www.lisihocke.com/2025/10/open... #osco #osco25
Reposted by Open Security Conference
Huge thanks to everyone for coming and contributing and sharing so much invaluable feedback - this gives more energy than you might realize. Lots of love also for my fellow organizers to make this unique event called #osco happen! My heart is full. ❤️ 2/2
October 5, 2025 at 5:03 PM
Huge thanks to everyone for coming and contributing and sharing so much invaluable feedback - this gives more energy than you might realize. Lots of love also for my fellow organizers to make this unique event called #osco happen! My heart is full. ❤️ 2/2
Reposted by Open Security Conference
Last lunch conversation was had, last train ride was shared. Now #osco25 is slowly starting to fade out and form fond memories. What a wonderful time we had together the last four days. 1/2
October 5, 2025 at 5:03 PM
Last lunch conversation was had, last train ride was shared. Now #osco25 is slowly starting to fade out and form fond memories. What a wonderful time we had together the last four days. 1/2
Reposted by Open Security Conference
Continued with me giving a super relaxed version of my workshop "Secure Development Lifecycle Applied - How to Make Things a Bit More Secure than Yesterday Every Day". Seems folks had fun practicing together. 🎉 #osco gave just the right space and crowd for it. 2/2
October 5, 2025 at 5:00 PM
Continued with me giving a super relaxed version of my workshop "Secure Development Lifecycle Applied - How to Make Things a Bit More Secure than Yesterday Every Day". Seems folks had fun practicing together. 🎉 #osco gave just the right space and crowd for it. 2/2
Reposted by Open Security Conference
Wow. Even the last morning of #osco25 was enlightening. 💡 Started with insightful breakfast conversations on company cultures and reward systems driving behavior. 1/2
October 5, 2025 at 5:00 PM
Wow. Even the last morning of #osco25 was enlightening. 💡 Started with insightful breakfast conversations on company cultures and reward systems driving behavior. 1/2
Reposted by Open Security Conference
On the last leg of my journey, got all trains, left roughly on time and now omw back to Berlin from #osco25. Had a blast, thank you to everyone, you created a truly unique event!
October 5, 2025 at 12:24 PM
On the last leg of my journey, got all trains, left roughly on time and now omw back to Berlin from #osco25. Had a blast, thank you to everyone, you created a truly unique event!
Reposted by Open Security Conference
On my way back home after an amazing (prolonged) weekend at @OSCo.
It was wonderful connecting with new faces, deepening existing relationships, and gaining valuable insights through exchange and discussion.
A huge thank you to the organizing team, the hotel […]
[Original post on chaos.social]
It was wonderful connecting with new faces, deepening existing relationships, and gaining valuable insights through exchange and discussion.
A huge thank you to the organizing team, the hotel […]
[Original post on chaos.social]
October 5, 2025 at 12:18 PM
On my way back home after an amazing (prolonged) weekend at @OSCo.
It was wonderful connecting with new faces, deepening existing relationships, and gaining valuable insights through exchange and discussion.
A huge thank you to the organizing team, the hotel […]
[Original post on chaos.social]
It was wonderful connecting with new faces, deepening existing relationships, and gaining valuable insights through exchange and discussion.
A huge thank you to the organizing team, the hotel […]
[Original post on chaos.social]
Yes. Yes, you've seen correctly. There's going to be an Open Security Conference 2026! 😍
🗓 Save the dates: November 5-8, 2026. ✅
opensecurityconference.org
#osco #osco26 #CyberSecurity #Security #InfoSec #AppSec #ProductSecurity #OTsecurity #OpenSpace [lisi]
🗓 Save the dates: November 5-8, 2026. ✅
opensecurityconference.org
#osco #osco26 #CyberSecurity #Security #InfoSec #AppSec #ProductSecurity #OTsecurity #OpenSpace [lisi]
Home
Welcome to the Open Security Conference (osco), the people-centred international gathering for everyone interested in cybersecurity. Join us 2-5 October 2025 in Rückersbach, Germany.
opensecurityconference.org
October 5, 2025 at 11:55 AM
Yes. Yes, you've seen correctly. There's going to be an Open Security Conference 2026! 😍
🗓 Save the dates: November 5-8, 2026. ✅
opensecurityconference.org
#osco #osco26 #CyberSecurity #Security #InfoSec #AppSec #ProductSecurity #OTsecurity #OpenSpace [lisi]
🗓 Save the dates: November 5-8, 2026. ✅
opensecurityconference.org
#osco #osco26 #CyberSecurity #Security #InfoSec #AppSec #ProductSecurity #OTsecurity #OpenSpace [lisi]
It's a wrap. Yes, that's it. The Open Security Conference 2025 is officially over. 😌
1/3
1/3
October 5, 2025 at 11:33 AM
It's a wrap. Yes, that's it. The Open Security Conference 2025 is officially over. 😌
1/3
1/3
It's the last day, the last morning of the Open Security Conference 2025. We've learned so much together these days. Now's the time to go deeper into some of those topics, spend the rest of the time for networking, relax and breathe this community spirit.
1/2
1/2
October 5, 2025 at 7:09 AM
It's the last day, the last morning of the Open Security Conference 2025. We've learned so much together these days. Now's the time to go deeper into some of those topics, spend the rest of the time for networking, relax and breathe this community spirit.
1/2
1/2
Reposted by Open Security Conference
Finally, finished the day with playing games and having great conversations. 💜 Very grateful for such a kind human crowd. And based on the feedback received so far, it wasn't only me having a great time at #osco! 🤩 4/4
October 5, 2025 at 1:22 AM
Finally, finished the day with playing games and having great conversations. 💜 Very grateful for such a kind human crowd. And based on the feedback received so far, it wasn't only me having a great time at #osco! 🤩 4/4
Reposted by Open Security Conference
Had great company at dinner and hence respective conversations. Of course, in the evening I gave another session of "Capture the flag Together" going on exploration into a system, and again many folks were eager to find these hidden secrets. 3/4
October 5, 2025 at 1:22 AM
Had great company at dinner and hence respective conversations. Of course, in the evening I gave another session of "Capture the flag Together" going on exploration into a system, and again many folks were eager to find these hidden secrets. 3/4
Reposted by Open Security Conference
Joined really great sessions, on using OSINT for good, on deception, on hacking tools. My co-conspirator Martin Schmidt offered people to playtest our little security card game - lots of fun and invaluable feedback. 2/4
October 5, 2025 at 1:22 AM
Joined really great sessions, on using OSINT for good, on deception, on hacking tools. My co-conspirator Martin Schmidt offered people to playtest our little security card game - lots of fun and invaluable feedback. 2/4
Reposted by Open Security Conference
What an awesome second #OpenSpace day at #osco25! Mine started with a session from us organizers to gather feedback for #osco26 from folks - they shared lots of good ideas we can build on. 💡 1/4
October 5, 2025 at 1:22 AM
What an awesome second #OpenSpace day at #osco25! Mine started with a session from us organizers to gather feedback for #osco26 from folks - they shared lots of good ideas we can build on. 💡 1/4
Reposted by Open Security Conference
#osco25 is great! Got up to have my breakfast at noon at the bar, around 1pm the lunch was served, now back to the bar for some cake :'-D
October 4, 2025 at 12:26 PM
#osco25 is great! Got up to have my breakfast at noon at the bar, around 1pm the lunch was served, now back to the bar for some cake :'-D
That was so fast - the second open space at the Open Security Conference 2025 is already coming to an end. We're all coming together to reflect, think about sessions for the evening and also our last day tomorrow.
Well, it's not over yet! 💜
opensecurityconference.org
#osco #osco25 [lisi]
Well, it's not over yet! 💜
opensecurityconference.org
#osco #osco25 [lisi]
Home
Welcome to the Open Security Conference (osco), the people-centred international gathering for everyone interested in cybersecurity. Join us 2-5 October 2025 in Rückersbach, Germany.
opensecurityconference.org
October 4, 2025 at 3:50 PM
That was so fast - the second open space at the Open Security Conference 2025 is already coming to an end. We're all coming together to reflect, think about sessions for the evening and also our last day tomorrow.
Well, it's not over yet! 💜
opensecurityconference.org
#osco #osco25 [lisi]
Well, it's not over yet! 💜
opensecurityconference.org
#osco #osco25 [lisi]
Aaaaand it's another full day of open space at the Open Security Conference 2025! Participants just started to present their session ideas for today.
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1/2
October 4, 2025 at 7:14 AM
Aaaaand it's another full day of open space at the Open Security Conference 2025! Participants just started to present their session ideas for today.
1/2
1/2
Reposted by Open Security Conference
The perfect closing for the day: chilling at the bar, trying ourselves at lockpicking. 🔓 So glad I finally had this opportunity!
What an insightful and enjoyable day at #osco. 💜 3/3
What an insightful and enjoyable day at #osco. 💜 3/3
October 4, 2025 at 1:00 AM
The perfect closing for the day: chilling at the bar, trying ourselves at lockpicking. 🔓 So glad I finally had this opportunity!
What an insightful and enjoyable day at #osco. 💜 3/3
What an insightful and enjoyable day at #osco. 💜 3/3
Reposted by Open Security Conference
Gave my "Capture the Flag Together" session, twice. The beginners edition in the afternoon was already so cool, introducing these puzzle learning challenges to more folks. Yet at the evening's adventurers edition we really smashed it! Had so much fun with finding these flags. 😁 2/3
October 4, 2025 at 1:00 AM
Gave my "Capture the Flag Together" session, twice. The beginners edition in the afternoon was already so cool, introducing these puzzle learning challenges to more folks. Yet at the evening's adventurers edition we really smashed it! Had so much fun with finding these flags. 😁 2/3
Reposted by Open Security Conference
This was such a blast. Had a wonderful #OpenSpace day at #osco25. So many awesome people in one place, all interested in #cybersecurity & learning together. ✨
Joined great knowledge exchange sessions on spreading cybersecurity awareness, the Fediverse, security champions struggles & wins. 💡 1/3
Joined great knowledge exchange sessions on spreading cybersecurity awareness, the Fediverse, security champions struggles & wins. 💡 1/3
October 4, 2025 at 1:00 AM
This was such a blast. Had a wonderful #OpenSpace day at #osco25. So many awesome people in one place, all interested in #cybersecurity & learning together. ✨
Joined great knowledge exchange sessions on spreading cybersecurity awareness, the Fediverse, security champions struggles & wins. 💡 1/3
Joined great knowledge exchange sessions on spreading cybersecurity awareness, the Fediverse, security champions struggles & wins. 💡 1/3
Reposted by Open Security Conference
#osco25 is the first conference where I'd have better fixed my sleep schedule before attending... rather than the conf itself being the reason for the messed up schedule. Although tbf, my sleep is always a mess :'-D
Slowly getting out of bed and trying to pretend to be alive ^^'
Yesterday was […]
Slowly getting out of bed and trying to pretend to be alive ^^'
Yesterday was […]
Original post on todon.eu
todon.eu
October 3, 2025 at 6:18 AM
#osco25 is the first conference where I'd have better fixed my sleep schedule before attending... rather than the conf itself being the reason for the messed up schedule. Although tbf, my sleep is always a mess :'-D
Slowly getting out of bed and trying to pretend to be alive ^^'
Yesterday was […]
Slowly getting out of bed and trying to pretend to be alive ^^'
Yesterday was […]
What a day. Already learned so much from this crowd - "be ready to be surprised" really holds true every time at #OpenSpace conferences like ours! 🌟
Off for dinner, afterwards the evening fun will start. 😁
opensecurityconference.org
#osco #osco25 #CyberSecurity #Security #InfoSec #AppSec [lisi]
Off for dinner, afterwards the evening fun will start. 😁
opensecurityconference.org
#osco #osco25 #CyberSecurity #Security #InfoSec #AppSec [lisi]
Home
Welcome to the Open Security Conference (osco), the people-centred international gathering for everyone interested in cybersecurity. Join us 2-5 October 2025 in Rückersbach, Germany.
opensecurityconference.org
October 3, 2025 at 4:32 PM
What a day. Already learned so much from this crowd - "be ready to be surprised" really holds true every time at #OpenSpace conferences like ours! 🌟
Off for dinner, afterwards the evening fun will start. 😁
opensecurityconference.org
#osco #osco25 #CyberSecurity #Security #InfoSec #AppSec [lisi]
Off for dinner, afterwards the evening fun will start. 😁
opensecurityconference.org
#osco #osco25 #CyberSecurity #Security #InfoSec #AppSec [lisi]
Some hints on candid communication: framing of mistakes is crucial. Stop looking for the guilty. How can we be notified faster? Demonstrated fallibility in regard of our own mistakes.
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📜 History repeating itself - Bianca Kastl
#osco #osco25 #CyberSecurity #Security #InfoSec #AppSec [lisi]
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📜 History repeating itself - Bianca Kastl
#osco #osco25 #CyberSecurity #Security #InfoSec #AppSec [lisi]
October 3, 2025 at 3:43 PM
The audience shared retros, non-violent communication helps - yet any tools fail without building safe interpersonal relationships. Just culture focuses on system and actions not people.
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📜 History repeating itself - Bianca Kastl
#osco #osco25 #CyberSecurity #Security #InfoSec #AppSec [lisi]
———
📜 History repeating itself - Bianca Kastl
#osco #osco25 #CyberSecurity #Security #InfoSec #AppSec [lisi]
October 3, 2025 at 3:38 PM