Never Trust, Always Verify

Zero Trust Security: Never Trust, Always Verify

NIS2, DORA, and the BSI Situation Report 2024 make it unambiguous: perimeter security has failed.

  • 01NIST-800-207-compliant strategy & roadmap
  • 02BeyondTrust PAM as the core of identity security
  • 03NIS2 and DORA compliance through Zero Trust
  • 04Incremental migration without operational disruption
11+Years of experience
120+Employees
540+Projects
ISO 27001certified

Why Zero Trust — and why now?

The classic security model — hard shell, soft core — fails against modern attack patterns. SolarWinds (2020) and MOVEit (2023) have demonstrated this: attackers who gain a foothold in the network move laterally undetected for weeks or months. Zero Trust eliminates implicit trust entirely. Instead, every access request is authorized in real time based on identity, device context, location, and risk assessment.

Our expert consultants provide comprehensive zero trust framework services tailored to your organization's specific needs. We combine deep regulatory expertise with practical implementation experience to deliver measurable results.

5 service modules

What we take on for you

Bookable individually or as an end-to-end programme.

01

Zero Trust Strategy & Assessment

We analyze your current security architecture against the CISA Zero Trust Maturity Model and NIST SP 800-207. The result: a detailed maturity model across all seven pillars, a prioritized roadmap with quick wins (typically 3–6 months for initial results), and a business case with ROI calculation. Existing investments, cloud strategy, and regulatory requirements (NIS2, DORA, ISO 27001) are all taken into account.

02

Identity & Privileged Access Management (with BeyondTrust)

Identity is the new perimeter boundary. As a BeyondTrust partner, we implement Privileged Access Management, just-in-time access, and least-privilege concepts at enterprise level. The solution encompasses: Privileged Remote Access, Password Safe, Endpoint Privilege Management, and Identity Security Insights. 80% of all breaches involve compromised credentials — PAM is the single most effective lever.

03

Microsegmentation & Software-Defined Perimeter

We eliminate flat networks through granular microsegmentation. Each application and workload receives its own security zones with dynamic policies. Lateral movement — the core of modern attacks (SolarWinds, NotPetya) — becomes structurally impossible. Implementation proceeds in phases: visibility phase, policy design, enforcement, and continuous optimization.

04

Zero Trust Network Access (ZTNA)

Traditional VPNs grant overly broad network access and represent a primary attack vector. ZTNA replaces VPN with application-specific tunnels that verify identity and context at every access request. We design and implement ZTNA architectures for remote work, cloud workloads, and third-party access — vendor-agnostic and integrated into your existing security infrastructure.

05

Continuous Monitoring & Security Analytics

Zero Trust does not end at access control — continuous monitoring is the nervous system of the architecture. We implement SIEM/SOAR integration, User and Entity Behavior Analytics (UEBA), and automated policy adjustment based on real-time risk assessments. Anomalous access patterns are detected and contained within seconds.

6 phases

Our Approach: From Assessment to Continuous Improvement

Our Zero Trust implementation follows the CISA Maturity Model and moves your organization systematically from Traditional through Advanced to Optimal.

  1. Step 1

    Zero Trust Readiness Assessment — Analysis of the current architecture across all 7 pillars, maturity level determination according to the CISA Maturity Model, gap analysis against NIS2/DORA requirements

  2. Step 2

    Strategy Development & Roadmap — Prioritization by risk and quick-win potential, definition of the target architecture (NIST SP 800-207), business case with ROI calculation

  3. Step 3

    Identity Foundation — Implementation of IAM/PAM as the foundation (BeyondTrust), MFA rollout, least-privilege enforcement, just-in-time access for privileged accounts

  4. Step 4

    Network & Access — Microsegmentation of critical assets, ZTNA introduction as VPN replacement, software-defined perimeter for cloud workloads

  5. Step 5

    Monitoring & Automation — SIEM/SOAR integration, UEBA for anomaly detection, automated policy adjustment, security orchestration across all pillars

  6. Step 6

    Continuous Improvement — Regular maturity assessments, adaptation to new threats and regulatory requirements, advancement toward the Optimal level per CISA

Sarah Richter

Your contact

Sarah Richter

Head of Information Security, Cyber Security

10+ years of experience, CISA, CISM, Lead Auditor, DORA, NIS2, BCM, Cyber and Information Security

Why Choose ADVISORI?

  • 01Deep regulatory and industry expertise
  • 02Proven track record with leading organizations
  • 03Practical, implementation-focused approach
  • 04End-to-end support from assessment to implementation

Expert Consultation Available

Contact our specialists today for a personalized assessment of your requirements.

14 QUESTIONS, BRIEFLY ANSWERED

Frequently asked questions about Zero Trust Framework

What exactly is Zero Trust and how does it differ from traditional IT security?

Traditional security trusts everything within the network perimeter. Zero Trust eliminates this implicit trust entirely: every access request is verified in real time based on identity, device context, and risk assessment — regardless of whether the user is working in the office, from home, or in the cloud. The principle 'Never Trust, Always Verify' has been standardized through NIST SP 800‑207 and is today the de facto standard for modern security architectures.

How long does it take to implement a Zero Trust framework?

A full Zero Trust transformation is a multi-year program (typically 2–4 years). However, first quick wins can be realized within 3–6 months — e.g., MFA rollout, Privileged Access Management with BeyondTrust, or ZTNA for critical applications. We work with a phased approach that delivers immediate security gains while simultaneously building the long-term architecture.

What does a Zero Trust implementation cost?

Costs vary significantly depending on the starting point, company size, and target vision. An initial assessment workshop with roadmap typically falls in the five-figure range. The total investment pays off through reduced breach costs (average: USD 4.45 million according to the IBM Cost of a Data Breach Report 2023), lower compliance overhead, and consolidated security tools. We prepare a detailed business case with ROI calculation.

Is Zero Trust relevant for cloud environments as well?

Especially for cloud environments. In multi-cloud and hybrid scenarios, there is no longer a traditional perimeter. Zero Trust is the native security model for the cloud. NIST SP 800‑207A explicitly addresses Zero Trust for cloud-based applications. All major cloud providers (Azure, AWS, GCP) offer Zero Trust services that must be integrated into an overall architecture.

Does NIS2 explicitly require Zero Trust?

NIS2 does not mention Zero Trust by name, but Article 21 requires measures that effectively amount to Zero Trust: access control policies, least privilege, multi-factor authentication, network segmentation, and continuous monitoring. DORA also requires a solid identity and access management framework under Article 9. Organizations that implement Zero Trust structurally fulfill these regulatory requirements.

How does Zero Trust work with existing legacy systems?

Zero Trust is not a rip-and-replace approach. Legacy systems are integrated incrementally: via upstream proxy architectures, microsegmentation, and identity-aware proxies. Critical legacy systems that do not support modern authentication are secured and isolated through Privileged Access Management (BeyondTrust Privileged Remote Access). Protection increases immediately, without needing to rebuild the systems themselves.

What concrete ROI does Zero Trust deliver?

Forrester estimates the 3-year ROI of Zero Trust at 92% for a typical enterprise. The drivers: 50% lower probability of a data breach, 50% reduction in compliance audit effort, consolidation of security tools (average 30% cost savings), and drastically reduced Mean Time to Contain (MTTC) for security incidents. Added to this is the strategic value: organizations with Zero Trust can execute cloud migration and remote work significantly faster and more securely.

What technological components are part of a Zero Trust architecture?

A complete Zero Trust architecture consists of various technological components that work together to consistently implement the "Never Trust, Always Verify" principle. The integration of these technologies enables a coherent security architecture that equally addresses identities, devices, networks, and applications.

🔐 Identity & Access Management:

• Modern IAM platforms with strong multi-factor authentication
• Privileged Access Management (PAM) for critical administrator accounts
• Adaptive and risk-based authentication systems
• Single Sign-On (SSO) with context-sensitive step-up authentication
• Identity Governance and Administration (IGA) for lifecycle management

📱 Endpoint Security & Compliance:

• Endpoint Detection and Response (EDR) for continuous monitoring
• Mobile Device Management (MDM) and Mobile Application Management (MAM)
• Endpoint Posture Assessment for continuous device compliance verification
• Application sandboxing and containerization
• Operating system hardening and patch management systems

🌐 Network Technologies:

• Software-Defined Perimeter (SDP) and Software-Defined Networking (SDN)
• Micro-segmentation through modern firewalls or micro-segmentation solutions
• Secure Access Service Edge (SASE) for cloud-based security architectures
• Zero Trust Network Access (ZTNA) as a replacement for traditional VPNs
• Software-Defined Wide Area Networks (SD-WAN) with integrated security controls

📊 Monitoring & Analytics:

• Security Information and Event Management (SIEM) with AI-based analysis
• User and Entity Behavior Analytics (UEBA) for behavioral analysis
• Network Traffic Analysis (NTA) for detection of suspicious communications
• Continuous monitoring and logging across all systems
• Security Orchestration, Automation and Response (SOAR) for automated responses

What challenges can arise when implementing a Zero Trust framework?

Implementing a Zero Trust framework confronts organizations with various technical, organizational, and cultural challenges. Recognizing and proactively addressing these obstacles is critical to a successful transformation to a Zero Trust security model.

🏢 Organizational Hurdles:

• Lack of executive sponsorship and strategic alignment
• Insufficient coordination between security, IT, and business units
• Resistance to change in established workflows
• Complexity in coordinating different teams and initiatives
• Difficulties in measuring the ROI of Zero Trust investments

💻 Technical Complexity:

• Integration of Zero Trust into existing legacy systems and applications
• Challenges in creating a complete asset inventory
• Balancing security and usability
• Managing identities and access rights across hybrid environments
• Technical debt from previous security architectures

🧠 Knowledge Gaps:

• Insufficient understanding of Zero Trust principles and philosophy
• Lack of expertise in modern security technologies
• Inadequate experience with context-based access models
• Difficulties in defining appropriate access policies
• Challenges in interpreting complex security data

⚠ ️ Implementation Risks:

• Operational disruptions due to changes in access paths
• Shadow IT and undocumented applications/resources
• Verification and validation of Zero Trust controls
• Avoiding security gaps during the transition
• Balancing rapid implementation with strategic planning

How is the least privilege principle applied in Zero Trust environments?

The principle of least privilege is a fundamental building block of every Zero Trust architecture and ensures that users, systems, and processes receive only the minimum necessary rights required to fulfill their legitimate tasks. The consistent application of this principle significantly minimizes the attack surface and limits potential damage in the event of successful compromises. Core Implementation Strategies: Developing a comprehensive permissions matrix for all resources and roles Implementing temporary and purpose-bound access instead of permanent rights Consistent application of Just-in-Time (JIT) and Just-Enough-Access (JEA) models Regular review and cleanup of no longer needed permissions Standardized processes for requesting, approving, and revoking rights User Access Management: Risk- and attribute-based authentication depending on access context Role-based access rights with regular recertification Privileged Access Management (PAM) for administrative accounts Segregation of Duties (SoD) to prevent conflicts of interest Multi-stage approval procedures for critical access requests System and Application Hardening: Reducing the attack surface by disabling unnecessary services.

How do Zero Trust approaches differ for various industries and company sizes?

Zero Trust is not a one-size-fits-all model — it must be adapted to the specific requirements, risk profiles, and regulatory circumstances of different industries and company sizes. A tailored implementation takes into account the respective business requirements, resource availability, and compliance obligations to achieve a balanced relationship between security, usability, and effort. Industry-Specific Adaptations: Financial sector: Focus on strict compliance (PCI-DSS, BAIT), protection of critical transactions and customer data Healthcare: Special requirements for the protection of patient data (GDPR, KRITIS) and medical devices Manufacturing: Integration of OT security and protection of intellectual property into Zero Trust strategies Public sector: Implementation in accordance with BSI requirements and specific security levels for government agencies Retail: Balancing customer experience with strict security controls in omnichannel environments Adaptations by Company Size: Large enterprises: Comprehensive, multi-year transformation programs with dedicated teams Mid-sized companies: Prioritized, phased implementation with a focus on critical business processes Small businesses: Cloud-based solutions with low administrative.

How does Zero Trust affect usability and productivity within an organization?

Contrary to the widespread assumption that a Zero Trust approach inevitably compromises usability, a well-designed implementation can actually increase employee productivity and improve the user experience. The key lies in an intelligent balance between security and usability through context-aware, risk-adaptive controls and smooth technology integration. Changes to User Interaction: Transition from VPN-based to application-specific access methods Reduction of friction through intelligent, context-based authentication Uniform and consistent user experience across different access scenarios Transparent security controls through integration into existing workflows Prevention of security workarounds through user-friendly security processes Modern Authentication Methods: Implementation of user-friendly multi-factor authentication (MFA) such as biometrics Use of Single Sign-On (SSO) for smooth access to multiple resources Risk-adaptive authentication with step-up only for unusual access patterns Passwordless authentication methods for an improved user experience Integration with existing identity systems and end-user devices Productivity Benefits: Location-independent, secure access without complex VPN configurations Faster onboarding process for new employees and partner access More.

What role does Zero Trust play in securing IoT and OT environments?

Securing Internet of Things (IoT) and Operational Technology (OT) environments presents particular challenges, as these systems often operate with limited resources, use proprietary protocols, and control critical processes. However, Zero Trust principles can be specifically adapted to effectively secure these heterogeneous environments and address the specific security requirements of IoT and OT systems.

🔌 Specific Challenges in IoT/OT Environments:

• Limited processing power and storage capacity of many IoT devices
• Long lifecycles with limited update capabilities
• Proprietary protocols and lack of standardization
• High availability requirements for many OT systems
• Convergence of IT and OT with different security cultures

🛡 ️ Adapting Zero Trust for IoT/OT:

• Implementation of device-specific identities and cryptographic authentication
• Gateway-based security concepts for resource-constrained devices
• Micro-segmentation at the network level rather than the device level
• Behavior-based anomaly detection for device monitoring
• Out-of-band security management for critical OT systems

🧩 Architecture Components:

• Secure device onboarding processes with device certificates
• Network Access Control (NAC) for IoT device identification and segmentation
• Industrial Demilitarized Zones (IDMZs) for IT/OT separation
• Specialized IoT security monitoring solutions
• Secure remote access solutions for maintenance access

📋 Implementation Approach for IoT/OT Environments:

• Comprehensive IoT and OT device inventory as a foundation
• Risk assessment and prioritization based on device criticality
• Development of IoT-specific security policies and compliance requirements
• Phased implementation taking operational constraints into account
• Continuous security monitoring and regular review

How can organizations measure and communicate the success of their Zero Trust initiative?

Measuring and communicating the success of a Zero Trust initiative is critical for sustaining leadership support, justifying investments, and enabling the ongoing development of the security architecture. A well-thought-out approach to measuring success combines quantitative security metrics with business value contributions and communicates these in a targeted manner to various stakeholders.

📊 Developing Meaningful Metrics:

• Establishing a Zero Trust Maturity Model with defined maturity levels
• Developing a balanced scorecard with technical and business KPIs
• Conducting regular security assessments and penetration tests
• Implementing continuous compliance monitoring
• Capturing and analyzing user experience feedback

💼 Demonstrating Business Value:

• Quantifying risk reduction through improved threat defense
• Measuring efficiency gains through automated security processes
• Evaluating the impact on employee productivity
• Analyzing cost savings through consolidation of security solutions
• Demonstrating improved compliance capabilities and reduced audit findings

📣 Targeted Communication by Audience:

• Executive level: Focus on risk reduction, compliance, and business enablement
• Business units: Highlighting improved usability and productivity
• IT teams: Detailed technical achievements and operational improvements
• Security teams: Progress in threat defense and incident response
• External stakeholders: Strengthening confidence in the organization's security posture

📈 Continuous Improvement:

• Establishing a structured feedback process for all stakeholders
• Regular review and adjustment of metrics and target values
• Benchmarking against industry standards and best practices
• Integration of lessons learned from security incidents
• Ongoing development of the Zero Trust roadmap based on success measurements

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ISO 9001 CertifiedISO 27001 CertifiedISO 14001 CertifiedBeyondTrust PartnerBVMW Bundesverband MitgliedMitigant PartnerGoogle PartnerTop 100 InnovatorMicrosoft AzureAmazon Web Services

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