Tillitis (@TillitisAB) header
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We are the creator of TKey, an open source hardware and open source software USB security key. Mastodon: @tillitis@mastodon.online

Gothenburg
Joined September 2022
Photo by Tillitis (@TillitisAB)Photo by Tillitis (@TillitisAB)Photo by Tillitis (@TillitisAB)Photo by Tillitis (@TillitisAB)Photo by Tillitis (@TillitisAB)Photo by Tillitis (@TillitisAB)
We recently discovered a security issue in the Go module tkeyclient used by all of our client apps. All versions of tkeyclient up to and including v1.2.0 are affected. For details, read our blog post at tillitis.se/blog/2026/03/17/…
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During summer we tried to setup a test Sigsum cosigning witness using a TKey for signatures. It worked out very well. We wrote down our findings in this guide: tillitis.se/guide-tkey-sigsu…
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We are updating platform and design on our websites. There is a sneak preview on the onion site: xgpocj7cwkfqg5iz6mluhiuzcrey…
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At SecurityFest 2025.
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🔉 Next generation of TKey has the code name Castor. We are now ready to do an Alpha release of Castor. It's for all you early adopters out there to test and possibility to give us feedback. ➡️ Read more about the details in Castor here: github.com/tillitis/tillitis…
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At Tillitis we love to solve problems. Advent of Code is about problem solving. For us, it's a natural thing to sponsor Advent of Code. tillitis.se/blog/2024/12/01/…
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The #OSFC2024 Aftermovie is out! 🍿 Thank you for a great conference - watch the Aftermovie on #Vimeo -> vimeo.com/1013446480
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Tillitis will change the open source license type on our code from copyleft to permissive. This will allow more people and organisations to use our design and code and especially our software libraries. Read more in our latest blog post: tillitis.se/blog/2024/10/02/…
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Are you in Stockholm? Come by at the sec-t community day (September 11th, 2pm) and listen to our talk about how to verify TKey and supply chain security. tillitis.se/blog/2024/09/10/…
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Welcome @TillitisAB 🤎 We are happy to announce that @TillitisAB is one of our bronze #sponsors of this years #OSFC2024
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We have written a detailed description of how the TRNG in TKey works. Read it here: tillitis.se/blog/2024/05/27/… #cybersecurity #infosecurity
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Will we see you next week at Security Fest? Tillitis is one of the sponsors this year. Join us in the village and code for the TKey. tillitis.se/blog/2024/05/20/…
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A vulnerability has been found in tkey-device-signer and verisigner. To exploit the vulnerability an attacker needs to use a custom client application and to touch the TKey. For more details, see Tillitis Security Bulletin 240115-1: bugbounty.tillitis.se/securi…
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We have fixed a bug in firmware, read about the details in our latest blog post: tillitis.se/blog/2024/03/26/…
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Check out our media archive. We'll collect links to all different recorded videos from presentations and articles about us here. tillitis.se/media-archive/ #CyberSecurity #informationsecurity #tillitis #tkey
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💥🔒 The Tillitis TKey is a RISC-V computer in a USB-C case, built for security applications! No persistent storage and app must be loaded every time you plug it in. Measures app integrity with Compound Device Identifier (CDI). @TillitisAB #TKey #Secur dev.tillitis.se/intro/
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