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My Internship at Riscure: Tristan Démare

Author: Tristan Démare, Valeria Vatolina

For Tristan, an internship at Riscure provided the perfect setting to explore the practical side of cybersecurity while contributing to groundbreaking research. Now returning to Riscure as a full-time Security Analyst, Tristan reflects on his journey, the projects he tackled, and his impressions of working at Riscure. Read on to discover how this experience shaped his career path.

Which study did you follow?

My academic journey began with a bachelor’s degree in general mathematics. From there, I pursued a master’s degree in mathematics, specializing in cryptography. This allowed me to dive deep into fascinating topics like elliptic curves, lattices, quantum cryptography, corrector codes, and cryptanalysis.

What was the topic of your research? 

During my internship, I worked on fault injection attacks targeting the rejection sampling process in the Dilithium signature scheme. It was a truly inspiring and fascinating subject that challenged me to combine theoretical knowledge with hands-on experimentation.

How did Riscure support you in carrying out the research? 

Right from the start, my tutor introduced me to all the people who were ready to help whenever I faced challenges. Weekly meetings with my tutor were invaluable, motivating me to find new solutions and stay on track while consistently improving my work.

What is your impression of the Riscure team and culture? 

Riscure is a truly fantastic company. One of the highlights for me was the incredible cultural diversity. It’s amazing to learn from colleagues with such varied backgrounds and experiences. Beyond work, there are many team events such as music nights and barbecues, and extracurricular activities like climbing and running groups. Even casual breaks—whether playing table football or chatting with colleagues—added to the enjoyable work environment.

What do you like the most about working at Riscure? 

I enjoy my job—it’s amazing to wake up every day and do something I’m passionate about. The work environment at Riscure allows you to organize your work in the way that works best for you. The ability to telework when needed is another significant advantage.

What made you choose Riscure for your internship assignment? 

I first learned about Riscure during a university conference where one of their team members spoke about their work in Side-Channel Analysis (SCA) and Fault Injection (FI). Coming from a more theoretical background, I was eager to dive into these topics while applying the knowledge I had gained during my studies.

What is the most memorable thing about working at Riscure? 

The most unforgettable moment was finding the solution to a problem I had been working on for weeks. The sense of accomplishment, coupled with seeing my first results, was incredibly rewarding. Starting my fault injection campaign was also a highlight—it was entirely new territory for me, and learning and experimenting with unfamiliar tools and techniques was exhilarating.

Who should consider doing an internship at Riscure? 

Anyone interested in starting a career in cybersecurity would benefit greatly from an internship at Riscure. The company regularly welcomes interns across a variety of domains, offering opportunities to learn and specialize. If you’re eager to apply your existing knowledge while acquiring new skills and experiences, Riscure is the perfect place to grow.

What inspires you in your work? 

What excites me most is the diversity of stimulating topics we get to work on. I also appreciate the opportunity to take in-house training courses to develop and expand my skill set. Beyond formal training, I’m inspired by the incredible knowledge and support of my colleagues, who are always ready to help us learn and grow.

Looking for an internship in the device security domain? At Riscure, we’re always on the lookout for new interns! Read more and apply here.

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