Trust and security for your digital world

PKI Overview

Rely on a powerful PKI to reliably protect identities, data, and communication in your organization.

  • 01Secure authentication and encryption for users, devices, and applications
  • 02Centralized management of digital certificates and keys
  • 03Fulfillment of regulatory requirements and industry standards
  • 04Protection against identity theft, data manipulation, and unauthorized access
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11+Years of experience
120+Employees
540+Projects
ISO 27001certified

PKI Overview

A modern Public Key Infrastructure (PKI) is the backbone of digital trustworthiness. It enables secure communication, identity management, and data integrity in an increasingly connected world. Organizations benefit from PKI through automated certificate management, compliance security, and the ability to securely scale digital business models.

Our PKI service includes the development of customized strategies, the selection and implementation of suitable technologies, as well as secure operation and continuous optimization of your PKI. We accompany you from the initial analysis to managed service and ensure sustainable security and compliance.

4 service modules

What we take on for you

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

01

PKI Strategy and Architecture

Development of an individual PKI strategy and future-proof architecture design that optimally supports your business goals and regulatory requirements.

  • Requirements analysis and goal definition
  • Design of root and sub-CA structures
  • Development of governance and policy concepts
  • Consideration of compliance requirements (e.g., eIDAS, GDPR)
02

Implementation and Integration

Technical implementation of the PKI, integration into existing systems, and automation of certificate processes for maximum efficiency and security.

  • Installation and configuration of CA systems
  • Automated certificate issuance and management
  • Integration into cloud, IoT, and enterprise environments
  • Secure key management and HSM integration
03

Operations and Managed Services

Secure operation of your PKI including monitoring, incident response, and continuous optimization. Optionally as a managed service by our experts.

  • Operational concepts and security policies
  • Monitoring and reporting
  • Incident response and emergency management
  • Managed PKI services by experienced specialists
04

Training and Awareness

Practice-oriented training and awareness programs for administrators, developers, and users for secure use and management of the PKI.

  • Training for PKI administrators and users
  • Awareness programs for secure certificate use
  • Workshops on compliance and best practices
  • Individual training concepts

5 phases

Our Approach

The introduction of a PKI requires a structured, risk-oriented approach that equally considers technical, organizational, and regulatory aspects. Our approach ensures that your PKI is secure, efficient, and future-proof.

  1. Analysis – Requirements gathering, risk assessment, and goal definition

  2. Conception – Development of a customized PKI design including governance and policies

  3. Implementation – Technical realization, integration, and automation

  4. Operations – Establishment of secure operational processes, monitoring, and incident response

  5. Optimization – Continuous improvement and adaptation to new requirements

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

+49 69 913 113-01 info@advisori.de LinkedIn
A powerful PKI is the foundation for digital trustworthiness. It not only protects data and identities but also enables effective business models and sustainable compliance in a connected world.

Our Strengths

  • 01Years of experience in the conception and implementation of complex PKI solutions
  • 02Vendor-independent consulting and selection of optimal technologies
  • 03Focus on automation, scalability, and compliance
  • 04Comprehensive approach: strategy, technology, processes, and governance

Expert Tip

A PKI only unfolds its full potential through consistent automation and integration into your business processes. Focus on lifecycle management and role-based access control to avoid certificate bottlenecks and security gaps. Our experience shows: Organizations that understand PKI as a strategic asset significantly increase their digital resilience.

20 QUESTIONS, BRIEFLY ANSWERED

Frequently asked questions about PKI Overview

What is a Public Key Infrastructure (PKI) and what is it used for?

🔑 A Public Key Infrastructure (PKI) is a system of policies, procedures, and technologies for managing digital certificates and cryptographic keys. It enables:

• Secure authentication of users, devices, and services
• Encryption of sensitive data and communications
• Digital signatures for integrity and non-repudiation
• Trusted identities across the internet, email, VPN, and IoT
• Fulfillment of regulatory requirements and protection against cyberattacks

How do the Certificate Authority (CA), certificates, and keys work together?

🏢 The Certificate Authority (CA) is the core of any PKI. It:

• Issues digital certificates and verifies identities
• Signs public keys and associates them with individuals or systems
• Manages revocation lists (CRL) and checks certificate status (OCSP)
• Ensures secure issuance, renewal, and revocation of certificates
• Guarantees that private keys never leave the CA

What are the benefits of an enterprise-wide PKI solution?

🚀 An enterprise-wide PKI offers:

• Centralized, flexible management of all certificates and keys
• Automated processes for issuance, renewal, and revocation
• Fulfillment of compliance requirements (e.g., eIDAS, GDPR, ISO 27001)
• Protection against phishing, identity theft, and man-in-the-middle attacks
• Flexibility for cloud, mobile, IoT, and hybrid IT environments

What are the greatest challenges in operating a PKI?

⚠ ️ The greatest challenges in operating a PKI are:

• Secure management and protection of private keys against theft
• Complex integration into existing IT systems and processes
• Automation and monitoring of the entire certificate lifecycle
• Rapid response to expiring or compromised certificates
• Adherence to compliance requirements and regular audits

How is the security of private keys ensured in a PKI?

🔒 The security of private keys is ensured through:

• Storage in Hardware Security Modules (HSM) or smart cards
• Strict access controls and role-based permissions
• Regular backups and secure key archiving
• Use of multi-factor authentication for key access
• Comprehensive logging and monitoring of all key operations

What role do Certificate Revocation Lists (CRL) and OCSP play in PKI?

📜 Certificate Revocation Lists (CRL) and OCSP are essential for PKI security:

• CRL centrally lists revoked certificates and is updated on a regular basis
• OCSP enables real-time status queries for individual certificates
• Both prevent the use of compromised or expired certificates
• Automated updates and distribution of revocation lists are mandatory
• Modern PKI solutions combine CRL and OCSP for maximum security

How can a PKI be integrated into cloud and hybrid environments?

☁ ️ For integrating a PKI into cloud and hybrid environments:

• Use of cloud-based CA services or hybrid PKI architectures
• Secure connectivity between on-premises and cloud systems
• Automated certificate provisioning for cloud workloads
• Integration with identity and access management solutions
• Consideration of compliance and data protection requirements

What are the best practices for certificate lifecycle management?

🔄 Best practices for certificate lifecycle management:

• Automated issuance, renewal, and revocation of certificates
• Early notification upon expiration or compromise
• Regular review and cleanup of certificates no longer in use
• Comprehensive documentation and traceability of all processes
• Use of centralized management tools for transparency and control

How does a PKI support Zero Trust and modern security architectures?

🛡 ️ Zero Trust & PKI:

• Certificates enable strong, identity-based authentication for users and devices.
• Microsegmentation and access control are supported through certificates.
• Machine-to-machine communication and API access are secured.
• PKI is an integral component of Zero Trust Network Access (ZTNA).
• Automated certificate management reduces attack surfaces and risks.

What sources of error and risks exist when introducing a PKI?

⚡ Common sources of error:

• Lack of governance and unclear responsibilities.
• Insufficient planning for scalability and integration.
• Weak key and password security.
• Inadequate automation leads to certificate bottlenecks.
• Incomplete documentation complicates operations and audits.

How can PKI be used for IoT and Industry 4.0 applications?

🤖 PKI & IoT/Industry 4.0:

• Certificates secure device identities and communication channels.
• Automated certificate issuance for large device fleets.
• Integration with IoT platforms and edge computing solutions.
• Protection against tampering and unauthorized access to machinery.
• Support for over-the-air updates and remote management.

What regulatory requirements must a PKI fulfill?

📚 Regulatory & Compliance:

• Adherence to eIDAS, GDPR, ISO 27001, and industry-specific requirements.
• Verifiable processes for certificate issuance and revocation.
• Ensuring data integrity and confidentiality.
• Regular audits and penetration testing of the PKI infrastructure.
• Documentation and traceability of all security-relevant operations.

How can a PKI improve the protection of emails and documents?

✉ ️ Email & Document Protection:

• Encryption of emails for confidentiality and data protection.
• Digital signatures ensure the integrity and authenticity of documents.
• Automated certificate assignment for users and systems.
• Protection of sensitive attachments and confidential communications.
• Compliance with legal requirements for electronic communications.

What role does automation play in modern PKI solutions?

🤖 Automation:

• Reduces human error and accelerates certificate processes.
• Automatic issuance, renewal, and revocation of certificates.
• Integration with DevOps and ITSM tools for continuous delivery.
• Scalability for large user and device fleets.
• Enhances security through timely response to threats.

How can a PKI protect against insider threats?

🕵 ️♂️ Protection Against Insiders:

• Strict access controls and role-based permissions.
• Logging and monitoring of all key and certificate operations.
• Use of Hardware Security Modules (HSM) for key management.
• Regular audits and reviews of access permissions.
• Compromised certificates can be revoked immediately.

What trends are shaping the further development of PKI systems?

🌐 PKI Trends:

• Cloud-based PKI services and managed PKI.
• Integration with blockchain technologies for decentralized identities.
• Automation and self-service portals for users.
• Support for IoT and mobile-first scenarios.
• Focus on compliance, transparency, and user-friendliness.

How can a PKI be integrated into DevOps and CI/CD processes?

⚙ ️ PKI & DevOps:

• Automated certificate provisioning for build and deployment pipelines.
• Integration with secrets management and container platforms.
• Secure code-signing process for software artifacts.
• Monitoring and rotation of keys in CI/CD environments.
• Support for infrastructure-as-code for PKI components.

What challenges exist when migrating an existing PKI?

🔄 PKI Migration:

• Ensuring compatibility with existing certificates and applications.
• Planning for parallel operation and phased transition.
• Transfer and protection of private keys and root certificates.
• Minimizing downtime and operational disruptions.
• Comprehensive testing and validation of the new PKI infrastructure.

How can a PKI contribute to securing remote work?

🏠 Remote Work & PKI:

• Certificate-based authentication for VPN, Wi-Fi, and endpoints.
• Protection of sensitive data when accessing from outside the corporate network.
• Automated certificate assignment for home office workstations.
• Integration with endpoint and mobile device management.
• Compliance with regulatory requirements for decentralized working.

How can a PKI improve the protection of APIs and microservices?

🔗 API Security:

• Certificate-based authentication and encryption of API communications.
• Protection against man-in-the-middle and replay attacks.
• Automated certificate management for microservices architectures.
• Integration with API gateways and service meshes.
• Transparent tracking and auditing of all API access.

Certificates, partners and more

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