/01
Make it clear.
Advice & expertise
Digital identity, cryptography, IAM and compliance: we help you understand the issues, choose an architecture and map your next steps.
Explore this areaCybersecurity. Digital identity. Trust.
Trust
is built.
Together.
We are consulting engineers and cybersecurity experts. We code, audit, analyse and advise, turning complex questions into practical answers. With rigour and a shared commitment to working together.
Technical minds. A shared purpose.
session-establishment.jsJS
// Trust starts in the code.
const readerKeyPair = await crypto.subtle.generateKey(
{ name: "ECDH", namedCurve: "P-256" },
true,
["deriveKey", "deriveBits"]
);WebCrypto · ECDH · P-256Read the code ↗
Mid-June 2026
Stelau joins iDAKTO!
We are delighted to join the iDAKTO group and begin a new chapter together. Our expertise in cybersecurity, audits and consulting meets that of a sovereign digital identity specialist.
Read our announcement on LinkedIn01 / Our expertise
Understand deeply.
Move things forward.
We bring together advice, audits and development. Because a good decision has to work in practice.
/02
Look closer.
Audits & assessments
We examine your systems, products and processes. Precise findings, supporting evidence and recommendations your teams can act on.
Explore this area/03
Build it.
Secure development
SDKs, verifiers, cryptographic mechanisms and trust services: we design, code and test the components you need.
Explore this areaEPITA / EGE
Cryptography is also passed on.
More than fifteen years teaching modern cryptography.
Think. Test. Share.02 / How we work
Code.
Ideas.
And people.
A code review over coffee. A workshop with your team. A paper that makes a difficult topic clearer. This is also what cybersecurity looks like at Stelau.
We use AI to explore, analyse and draft our papers. Our engineers check the results against sources and take responsibility for the conclusions.
Get to know us03 / Work you can see
Trust,
in practice.
04 / From our notebooks
What we build.
What we learn.
Geneva 2026: putting wallets to the test
France Identité, Google Wallet, ISO mdoc and OpenID: a week of interoperability testing and discussions in Geneva with Nicolas Chalanset and Loïc Perry.
Verifying mDocs in the Browser: A Deep Dive into ISO 18013-5
How we built a fully client-side mDoc verifier using WebCrypto, Web Bluetooth, and CBOR — no backend required.