Use case

EBIOS Risk Manager Enhanced with FAIR™ Quantification

EBIOS Risk Manager's comprehensive scenario-based methodology identifies critical cyber risks. When multiple scenarios share the same severity level, prioritizing actions becomes challenging without understanding the impact in business terms. FAIR quantification complements EBIOS RM by adding loss magnitude and frequency estimates to your scenarios, which enables defensible security investments.

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Why it matters

Complement EBIOS RM assessments with quantified business metrics

FAIR can be integrated directly into an existing EBIOS RM workflow. Quantification is applied selectively to priority scenarios identified during the process, adding Loss Event Frequency and Loss Magnitude estimates where financial justification is required. This combined approach preserves alignment with ISO 27005 while extending EBIOS outputs into measurable, decision-oriented risk treatment recommendations.

“Can I integrate FAIR into my existing EBIOS RM process?”
“How complex is a FAIR analysis compared to an EBIOS RM assessment?”
“What's the time investment required to quantify a risk scenario with FAIR?”
“Does adding FAIR quantification maintain our ISO 27005 compliance?”
Our approach

From severity scales to quantitative Risk Metrics

C-Risk's EBIOS RM x FAIR methodology enhances your existing EBIOS RM risk assessments. We work directly with your EBIOS RM outputs, including feared events, strategic scenarios, and operational scenarios, to complement your analysis with financial quantification where it delivers the most value for decision-making.

Our approach focuses on the highest-priority risk scenarios identified in your EBIOS RM Workshop 5, transforming qualitative severity and likelihood ratings into quantified Loss Magnitude and Loss Event Frequency. The result: defensible risk metrics that support budget requests, investment prioritization, and board-level reporting.

Discovery & Scope Validation

Review Workshop outputs and select priority risks. Validate feared events and scenarios within your ISO 27005 framework.

Loss Magnitude Quantification

Transform severity scales (G1-G4) into financial ranges using FAIR's six loss types through stakeholder interviews and industry data.

Loss Event Frequency Analysis

Quantify likelihood as loss event frequency, incorporating threat intelligence and contact probability for complete risk exposure.

Risk Synthesis & Reporting

Deliver loss exposure ranges (min/likely/max) enabling objective prioritization and financial justification for security investments.

Explore our framework for integrating quantitative financial metrics
 into your EBIOS RM assessments.

It addresses ISO 27005 alignment and methodological foundations.

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C-Risk Success Stories

What our customers are saying

"State-of-the-art approaches"
C-Risk is a thought leader and ambassador of Cyber Risk Quantification in Europe with a strong influence on the market. The team is working relentlessly on educating organizations and quantifying their top risks with state-of-the-art approaches in order to improve decision-making on (cyber) risks. 
David Steng
Director Cyber Risks & Economics @ Fresenius Group
"I highly recommend C-Risk"
Over the past two years, I have worked with C-Risk on a number of projects, from performing FAIR-based quantitative risk assessments and consulting on Information Security strategy to GDPR/SOX 404 compliance work. C-Risk has a deep understanding of each subject area, in particular the FAIR methodology. They have a flexible approach and are able to scale depending on your needs. I highly recommend C-Risk to anyone seeking risk assessment or information security consulting services.
Markus Kaufmann
C|CISO
"tailored to our needs"
C-Risk is a reliable partner in our transition from a maturity-based to a risk-based information and cyber security approach. Over the past years, with the assistance of C-Risk's professional team, we have assessed several critical cyber risk scenarios using the FAIR-based quantitative risk assessment methodology. One of the most significant values delivered by these assessments was the opportunity to apply the results in defining accurate requirements that were tailored to our needs when updating our cybersecurity insurance policy.
Giorgi Gurielidze
Head of Information Security, CISO @ TBC Bank
Enhance EBIOS RM Workshop Outputs
with FAIR Quantification

Our integrated approach quantifies your top EBIOS RM risk scenarios with financial loss ranges and delivers cost-benefit analysis to help prioritize your risk treatment investments.

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C-Risk FAQ

Frequently Asked Questions About EBIOS and FAIR

What is EBIOS Risk Manager and how does it work?

EBIOS RM is a structured cyber risk analysis and management method developed by the ANSSI, the French National Cybersecurity Agency, and widely used in France. It provides a structured qualitative approach to cybersecurity risk assessments, based on five workshops covering scope definition, scenario construction, and risk treatment.

Is FAIR aligned with ISO 27005?

Yes. FAIR is designed to complement major risk management frameworks, including ISO 27005. While ISO 27005 defines the overall risk management lifecycle, it does not prescribe how to quantify likelihood or impact. FAIR fills that gap by providing a structured quantitative model for estimating Loss Event Frequency and Loss Magnitude, producing defensible financial risk metrics within an ISO-aligned process.

Do I need extensive internal data to apply FAIR quantification?

No. FAIR does not require perfect data maturity to get started. Quantification is built on calibrated estimates, expert input, and available internal or external reference data. The goal is not artificial precision, but defensible ranges for frequency and loss magnitude that improve scenario comparison and treatment decisions. Over time, organizations can refine inputs as measurement practices mature.