Security Advisory: tkeyclient
We recently discovered a security problem in the tkeyclient Go module used by several of our client apps. All versions of tkeyclient up to and including v1.2.0 are affected.
Newsletter December 2025
Usually at this time of year we look back and summarize what has happened during the year. We will do the same this year and also start a new tradition by publishing a newsletter. The idea is to have more frequent updates on what is happening at Tillitis by writing a newsletter 3-4 times per year. The newsletter will be published on our blog and sent out on the mailing list, Tillitis announce .
foss-north 2025
In April, some of us attended the foss-north 2025 conference in Gothenburg. We had a very good time, listened to interesting talks, and met many friends.
Updated Website
While we are working on updating TKey and adding new features, we also take the opportunity to update the design and platform on our websites; tillitis.se and bugbounty.tillitis.se. Both sites are now statically generated with Hugo .
2024 - Retrospective
As the year draws to a close, it’s natural to reflect on the past 12 months. 2024 marked the second full year of operations for Tillitis, and while it had its challenges, it was also a year of progress and learning.
Tillitis Sponsors Advent of Code
For third year in row, Tillitis sponsors Advent of Code . Advent of Code is an Advent calendar of small programming puzzles for a variety of skill levels that can be solved in any programming language you like. It’s made by Eric Wastl .
Change of Source Code License
Tillitis has always been committed to open source . As we promised earlier, we continue to be committed to open licenses. We originally chose “GPLv2-only” as the license for our Verilog and source code. We are now changing to the more permissive BSD 2-clause license for all Verilog and source code. The hardware (PCB, PCBA) license remains the same: CERN Open Hardware License Version 2 - Strongly Reciprocal.
sec-t community day
We will be at sec-t in Stockholm this year and MC from our development team will speak on the community day about verifying the TKey .
High quality noise in a FPGA - How the TKey TRNG works
What is a TRNG, what is its purpose, and how does it work? These are the questions we try to answer in this blog post.
Tillitis village sponsor @ Security Fest
This year, Tillitis is one of the sponsors of Security Fest . Tillitis is a village sponsor, meaning we will be there coding on new functionality for TKey. The village concept also means anyone participating at the conference can join us in the village and code together with us.