Chaire Cyber CNI

Chaire Cyber CNI – Cybersecurity for Critical Networked Infrastructures

[TALK27] A Semantic Investigation System – François Khourbiga (Defants, FR)

On Wed, Jan 25th, 2023, 2pm CET, François Khourbiga (Defants, FR), will talk about “A Semantic Investigation System“. You are cordially invited to join the free live stream on youtube and LinkedIn! Please share the link with your interested friends!

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We provide an overview of how we built a semantic forensic cyber security system based on the Notional SemaFor system proposed by DARPA. We will provide a quick look at the context of digital forensics and incident response, as well as the challenges posed by the state of the art. Then, we will present the four major topics we address to build a forensic semantic system: mutlimodal representations, reasoning ensembles, explanation & integration, and semantic models.

The talk will conclude with a concrete result on how it is used in cybersecurity and provide next steps for future work.

Watch the trailer here.

François Khourbiga

François Khourbiga is the CEO and co-founder of Defants. He spent 20 years working in Cybersecurity for the ANSSI attached to French Prime Minister services as Incident Responder and has helped many organization to face cyberattacks during 10 years. Then, he joined the French Ministry of Armed Forces as an Cyberdefense Engineerer in a reverse-engineering team for security research and development. After 15 years in public services, he was in charge of a research and development team at Orange Cyberdefense in charge of building the next generation of product for the company, before joining Mandant, one leader in Incident Response Services, as Incident Responder to help large companies facing the most advanced persistent threats.

in 2019, he went back to school at l’Ecole Polytechnique to follow an Executive Master program to develop its skills in entreupreneurship in the design, deployment and management with a strong technological and innovation dimension, in an international context.


Defants is a cybersecurity software development company, based in Rennes (France), and our mission is to redefine digital forensic and incident response (DFIR). The DFIR requires higly-skilled expert in a shortage of talent context, an excessive number of non-interoperable tools, and consumes a tremendous amount of time. We provide an eXtended DFIR Platform that brings together the automation of tools, the collaboration between junior and senior experts and make the DFIR simpler, faster and straigthforward. Our unique platform uses our semantic investigation engine to uncover the tactics and techniques used by attackers, because habits die hard.

The Cyber CNI Lecture Series is a free monthly event that typically takes place on the last Wednesday of the month from 2pm to 3h30pm CET.

The event consists of a 45-minute expert presentation followed by a 45-minute discussion.

The Cyber CNI Speaker series aims to raise awareness and understanding of cyber security issues among all audiences. It aims to enable an ongoing dialogue between experts from industry and academia and the general public (citizens, families, small and large businesses, public organizations, etc.). All of us are concerned.

The events are broadcast live on Youtube ( and LinkedIn, allowing worldwide remote participation – including a tool to participate in the discussion.

You can add the event calendar via ICSwebcalHTML.

How the digital transformation is changing our lives

The COVID-19 pandemic has shown all of us the benefits of information technology. It allows us to work at a distance, to live at a distance, and most importantly, to keep in touch at a distance – with younger and older people, those closest to us, and even make new contacts.

Our society relies more and more on information and operational technologies. Examples include water, energy, heat and cooling supply, communications, healthcare, production and processing of goods, transportation, national security, banking, research and education, and food production.

What all these areas have in common is that they make intensive use of networked distributed computer systems. These systems can be attacked in many ways. This is no longer just a problem for computer “pros” because computer systems are essential to all of us. The effects of “cyber-attacks” range from power outages to the collapse of the health care or banking sectors.

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