Calle Svensson

Security Engineer @ XTX. MSc in eng. physics & CompSci, dev & gamer. ❤️ music & long distance running. Wanna do a PhD sometime. Same U/N on all other sites

[LiveCTF @livectf]

We didn't really post here during the event but DEFCON CTF Quals just concluded and LiveCTF was part of it with a new concept. Check out our website https://t.co/FDlcw7kiGT to find links to all the recap streams we did and witness the chaotic bird training action!

[Calle Svensson @ZetaTwo]

@kistapk Really glad you liked it!

[Calle Svensson @ZetaTwo]

I'm optimistic we can create _some_ type of knowledge-based security-related community activity but traditional online jeopardy-style CTF as a competitive format is on its deathbed and this video hurts. Big love to the community that has meant the world to me the past 11 years!

[Renwa @RenwaX23]

"Dad, what was it like playing CTFs before AI?"

[Calle Svensson @ZetaTwo]

@lolzareverser @livectf Two things here. The terminal sharing thing was always for the finals, which will happen in August. This was the qualifiers which has had a different format (check previous year's streams) but we changed the format for the quals this year and will prob for the finals too

[Calle Svensson @ZetaTwo]

Really proud of this year's edition of @livectf! And it seems to actually generate some interesting problems to solve for the teams. Next stream is in 40 min. Check it out!

[Jordan Wiens @psifertex]

If you aren't playing DEFCON CTF quals this weekend (heck, even if you are) and you want to see what's going on, check out LiveCTF!
https://t.co/D42bZXSIxz

[Calle Svensson @ZetaTwo]

I'm once again looking for a friend willing to proof-read my latest article. Ideally someone with some reverse engineering and maths knowledge.

[Calle Svensson @ZetaTwo]

My @REverseConf talk about reverse engineering #AoE2 is now available on YouTube: https://t.co/EJvTfsIAnS check it out and hear about some reverse engineering techniques and a code pattern matching tool I released: https://t.co/n7ewkbVD6s

[Calle Svensson @ZetaTwo]

@BackEngineerLab @belabs_engineer @belabs_james Such a great presentation! One of my favourites from the conference. Keep up the great work!

[Calle Svensson @ZetaTwo]

@momo5502 Thank you! Glad you liked it! :D

Anytime! I'll hopefully get back to you with both questions and results once I have time to get back to this project later this year.

[Calle Svensson @ZetaTwo]

@OwariDa @HackingForSoju @beist Damn, already 10 years ago. That was a great trip!

[Calle Svensson @ZetaTwo]

@lauriewired It was such a good con. Nice to see you there and thanks for a great talk!

[Calle Svensson @ZetaTwo]

Check out my new article on obfuscation (and all the other cool articles) in the latest issue of PagedOut!

[PagedOut @pagedout_zine]

Here it is, our biggest issue to date, Issue #8!
Read, share, enjoy!
https://t.co/kVmdLe0l7s
Get prints here - https://t.co/ZM9myg3dPh

And with that CFP for #9 is open - deadline 30 April 2026

[Calle Svensson @ZetaTwo]

@ScepticCtf @diff_fusion @SeTcbPrivilege @SinSinology Congratulations! Really cool!

[Calle Svensson @ZetaTwo]

@OnimaruEsports Good

[Calle Svensson @ZetaTwo]

Really looking forward to share my work on #AgeofEmpires with you all and to visit the conference.

[RE//verse @REverseConf]

Carl Svensson (@zetatwo) is bringing Age of Empires II Definitive Edition to RE//verse 2026 as a playground for tooling. This talk walks through Binary Ninja automation to decrypt and deobfuscate game code and a BNIL query system for matching obfuscated instruction patterns. If you like game reversing you will want to see this talk: https://t.co/mcEALrFHCj

[Calle Svensson @ZetaTwo]

@MelonMusk75 The concept: highly debatable, I'd lean "no".
This particular implementation: ROFLMAO, not even close

[Calle Svensson @ZetaTwo]

LOL. I got emailed by some site building "open source profiles" for hiring, scraping GitHub and adding some things on top. You can opt out in your profile and they'll delete your page. The catch? There's no auth at all. Anyone can go and delete me here: https://t.co/tGrXj3gFYy

[Calle Svensson @ZetaTwo]

I'm proud of you all. My page disappeared within an hour of posting this.

[Calle Svensson @ZetaTwo]

@T90Official Love you Tristan but those glasses and that 'stache combo is probably the douchiest look I've seen in quite a while. :'D

[Calle Svensson @ZetaTwo]

Any friends with solid low-level skills (RE, obfuscation, etc.) around to provide feedback on my new @pagedout_zine article?