Calle Svensson

@ZetaTwo

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

London, England zeta-two.com Joined April 2009

724 Following 6.8K Followers 7.7K Posts

Latest posts 5

Calle Svensson @ZetaTwo Oct 17

Awww yeah! Huge congratulations to everyone involved this year. Really cool to see how Sweden went from not participating to winning in a short time. My contributions this year were small but I am proud having contributed throughout the years to the build up towards this.

European Cybersecurity Challenge @ECSC_openECSC Oct 16

After an incredible week of challenges, teamwork and intense competition, we are proud to announce the ECSC 2026 champions: Team Sweden! 🇸🇪 🇪🇺 A special thank you to Schwarz Digits for supporting ECSC 2026 and for handing over the first prize to our champions! 🏆

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Calle Svensson @ZetaTwo Sep 27

Back on the dating apps since a few weeks back and I feel like this could be a much less painful experience if people afforded each other just a modicum of treating each other like actual living people.

Calle Svensson @ZetaTwo Sep 20

I have recovered my old site including my poems that I wrote in my teens. I'm torn on what to do about this because on one hand, some of them are not completely terrible but on the other hand, the themes are exactly what you would expect from an awkward and edgy teenager. :D

Calle Svensson @ZetaTwo Aug 13

Come work with me at XTX in London! Small team with a lot of autonomy at a workplace with great colleagues and benefits: xtxmarkets.com/job/?role=Secu… Please reach out if you have any questions about the role or company!

Calle Svensson @ZetaTwo Jul 27

Fresh hot PagedOut issue! As usual, I have written an article, this time about using some maths for obfuscation. This is the concept that was the basis for my Google CTF 2024 challenge, "Not Obfuscated". Check it out together with all the other great articles!

PagedOut @pagedout_zine Jul 27

Paged Out! #9 is live!
Read, share, enjoy!
pagedout.institute/?page=issues.p…

We are running final QA on all PO! issues that should be available on Lulu (lulu.com/spotlight/page…) in a few days!

In case you want to support us, we have a Patreon now - patreon.com/PagedOut

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