About / The Stelau team
Deep expertise.
Approachable people.
Since 2002, Stelau has brought together consulting engineers and cybersecurity experts to support organisations building digital trust. Our expertise grows through practical experience, experimentation and sharing knowledge.
A trusted platform starts with a team you can trust.
Our approach
Hands-on expertise,
as a starting point.
FullVerify brings our expertise to digital verification. The same team applies that knowledge across Stelau’s consulting, audit and development work.
From standards to real use
We study eIDAS, OID4VP, ISO 18013-5 and EUDI Wallet standards, then put them to the test through real implementations.
Analysis you can share
We make technical subjects understandable. Reports, papers, workshops and documentation help teams make decisions and move forward.
Our expertise for insuranceTechnology and teamwork
We work alongside your teams. AI helps us explore and write, supported by verified sources and reviews by our engineers.
The people behind the projects
Let’s
meet.
Consulting engineers and cybersecurity experts with different backgrounds and a shared commitment to sound work.
Nicolas Chalanset
Head of Expertise
Benoit Leger-Derville
Head of Consulting
Quentin Ropele
Cybersecurity engineer
Loïc Perry
Cybersecurity engineer
Paul Chabas
Cybersecurity engineer
Hector Colin
Cybersecurity engineer
Julien Erhard
Cybersecurity engineer
Lucas Kotevski
Cybersecurity engineer
Kilian Hardy
Cybersecurity engineer
Our story
Since 2002.
And a shared future.
A story of expertise, trust and teamwork. Nicolas Chalanset and Benoit Leger-Derville founded Stelau with a shared ambition: understand difficult subjects and help projects move forward.
Stelau begins.
Nicolas Chalanset and Benoit Leger-Derville found Stelau: information security experts working together on demanding projects.
Teaching at EPITA.
Benoit begins teaching secure electronic signatures at EPITA. Sharing knowledge extends the work carried out in the field.
Auditing with LSTI.
LSTI-approved auditors and lead auditors for eIDAS and ISO/IEC 27001: understand requirements, examine evidence and document rigorous findings.
Expertise for insurers.
Benoit joins the IXI-Plus network as a cybersecurity expert and technical specialist. Real attacks and claims deepen our judgement.
Assessment. And building reBop.
Assessment work is conducted within the scope of ANSSI approval. In the same year, Benoit co-founds reBop, dedicated to certificate lifecycle management.
Security, all the way into the code.
Secure development features in our history: translating expertise into applications and trust components, with cryptography at the heart of implementation.
Supporting certification.
Preparing products and their assessment documentation, including CSPN. Benoit also begins teaching modern cryptography at the École de Guerre Économique.
France Identité.
Supporting France Identité connects application certification, high assurance and European peer review.
A new chapter with iDAKTO.
In mid-June, Stelau joins iDAKTO. We are delighted to bring our expertise together to advance trusted digital identity.
Selected milestones from our journey. Our website in 2025 ↗ · Career and teaching ↗ · LinkedIn ↗