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Difenso was born from the meeting of two visionaries

In 2015, two cybersecurity experts from different sectors - Defense and Banking - shared the same realization: cryptography was a massive failure. They decided to tackle this issue with a disruptive encryption innovation!

2015

Creation of Difenso and the founders’ holding company

2016

1st funding round Development of the technology and certification funding

2017

ANSSI First-Level Security Certification (CSPN)

2019

2nd funding round Industrialization of the solutions

2024

3rd funding round Optimization of communication
Launch into international markets

Building the future of cryptography

In a world where cyberattacks have reached unprecedented levels of sophistication, threats continue to escalate. The alliance of Artificial Intelligence and Quantum Computing is redefining the power of attackers. 

While groundbreaking, these disruptive technologies carry immense risks: the theft and manipulation of sensitive data, the paralysis of critical systems, and the erosion of individual freedoms.
In the face of this unprecedented challenge, the digital sovereignty of nations, the competitiveness of businesses, and the trust of citizens are being put to the test.

Our belief
every piece of data deserves absolute protection

We firmly believe that protection must begin where it matters most: the data itself. Protecting peripheral systems is no longer enough. Every bit, every byte of your strategic information must be secured. That’s why we have developed a groundbreaking encryption technology designed to address current and future threats, including quantum attacks.

Our mission
empowering those who build the future

We enable you to regain control of your sensitive data. In a hyperconnected world where collaboration is essential for innovation and growth, we transform security from a barrier into a facilitator. We provide you with a simple, effective solution to collaborate with complete peace of mind. We protect your reputation and competitiveness in international markets and contribute to a secure, sovereign, and liberty-respecting European digital space.-

Our commitment
innovate to protect, and move forward

Cryptography is more than a tool.
It is a shield for your data, a guarantee for your exchanges, and a driver for your future. With our solution, we invite you not just to withstand threats but to anticipate, contain, and overcome them. We are at the dawn of a new era of digital security. Together, let us make data protection the foundation of freedom, trust, and innovation.

An expert and systemic vision of cryptography

A vision that is both technical, strategic, and systemic in cybersecurity, aimed at shifting paradigms in a market that remains immature yet indispensable.

20 years

of experience in the defense, research, industry, and banking sectors

10 years

of collaboration through the creation of Difenso, serving clients across all sectors.

Texte ?

René-Claude DAHAN

René-Claude DAHAN

The man who has been helping banks improve their protection for 20 years. The result of a subtle alliance between deep technical expertise and the ability to address the entire security challenge in all its technical and strategic dimensions.

Éric STEFANELLO

Éric STEFANELLO

An Armament Engineer who delved into cybersecurity at a young age in the 1980s, when the KGB was already threatening our most sensitive systems.

Jérôme
RAZNIEWSKI

CTO, Engineer specializing in protocol and network security (Orange, Banque Postale…)

José
DUARTE

CISO, Engineer and security expert for security infrastructures (Banque Postale, SUEZ, DGA, EDF…)

Stanislas
FRANCFORT

Mathematician, Cryptography Expert, and Data Scientist (Orange Lab)

Gilles
ETCHEPAREBORDE

Technical Architect in Cybersecurity (Thales, Banque Postale…)

Denis
DIGUET

Engineer specializing in information system security (Sopra Steria, Weave, Provadys, ENI…)

The partners who gelp us go further

Meet the experts with activities complementary to ours, helping us better meet your needs.