In 2025, 68% of successful cyberattacks in France exploited a compromised legitimate access. The classic perimeter model — a 'castle wall' around the network — has become obsolete. Zero Trust starts from a simple principle: never trust, always verify.
The 5 pillars of Zero Trust
1. Continuous identity verification: adaptive MFA, biometric authentication, connection context verification. 2. Network microsegmentation: isolate each workload to limit the lateral attack surface. 3. Least privilege access: each user and service only accesses strictly necessary resources. 4. End-to-end encryption: mTLS between all services, data encryption at rest and in transit. 5. Continuous monitoring and analytics: real-time behavioral anomaly detection (UEBA).
Case study: Zero Trust deployment for an industrial group
An industrial group of 2,500 employees across 12 sites entrusted us with redesigning their security architecture. In 8 months, we deployed: a centralized IAM solution (Azure Entra ID + Conditional Access), microsegmentation of the industrial (OT) and office (IT) network, a next-generation SIEM with custom detection rules, and training for all employees. Result: 72% reduction in security alerts (elimination of false positives), mean detection time from 48 hours to 2 hours.
CybersecurityZero TrustNIS2IAM
About the author
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Sophie LECLERC
Security Consultant, ACCENSEO
CISSP and CISM certified cybersecurity expert. Sophie works on security audits, NIS2 compliance, and Zero Trust architecture design for mid-market and large enterprises.
