Public Key Infrastructure Services

Trusted PKI Solutions for Automotive and IoT Industry

Public Key Infrastructure (PKI) services form the backbone of secure communication in connected ecosystems like automotive and IoT. They provide the technologies, policies, and processes required to manage public key encryption and digital certificates—ensuring the authenticity, integrity, and confidentiality of data exchanged between vehicles, devices, and backend systems.

In industries, where safety and trust are paramount, PKI enables secure software updates, trusted device identities, and protection against cyber threats. Our PKI services support a wide range of security-critical operations, including:

Digital certificate issuance and lifecycle management
Secure storage of cryptographic keys via HSM services
Signing of OTA (Over-the-Air) updates and containers
Encryption of firmware, software packages, and sensitive data
Key provisioning for connected devices and embedded systems
Remote attestation to verify system integrity
Automation of trust workflows across cloud and embedded environments

Our cybersecurity teams in Germany (diconium) and India deliver PKI services that meet the needs of high-assurance environments, from connected vehicles to medical and industrial systems.

With a proven infrastructure built on certified Hardware Security Modules (HSMs), robust token generation systems, and a user-centric UI, our PKI solutions are trusted by automotive industry leaders.

With our foundational PKI infrastructure now firmly in place, we are actively scaling to support additional PKI services such as software signing, boot image signing, and encrypted Over-the-Air (OTA) update packages, further advancing our client's cybersecurity capabilities and operational efficiency.

Gunaseelan Sivanandam,

Senior Product Owner Embedded Security, diconium

Security Controls Built into Our Public Key Infrastructure Services

Hardware-Based Certificate Signing

The system is anchored by a **physical HSM** hosted in a secure data center in Germany.

This HSM is specifically used to **sign the generated tokens, binding each token cryptographically to its source**.

Infrastructure Security and Assurance

We maintain infrastructure integrity through:

Continuous security monitoring

Automated, regular server backups

Routine penetration testing

These controls ensure a secure, tamper-resistant token service.

Standards-Based Compliance and Validation

The service is designed following **NIST CSF**, **ISO 27001** and **TISAX** information security standards.

These frameworks guide the management of information security, risk controls, and governance across the service lifecycle.

Isolated and Segmented Infrastructure

The backend infrastructure is **physically and logically segregated** from general IT systems.

Only authorized personnel have access to the PKI system, which significantly reduces the attack surface and risk of unauthorized interaction.

Mutual TLS and Credential-Based Authentication

Access to the system is strictly protected using **mutual TLS (mTLS)** in combination with **username/password authentication**.

This dual-layer security ensures that only authorized users with valid certificates can access any PKI functions.

Public Key Infrastructure Services Enabling Trusted Partnerships

20,000+

Tokens

100+

Users

Countries

What’s Behind the Secure PKI Architecture?

Core PKI components — including the UI, backend API, and HSM server — operate within an mTLS-enforced environment. This allows only verified access to cryptographic operations.

User Interface (GUI)

Allows users to request and manage tokens securely.
Bound to user credentials and certificate-based access.
Designed for easy use in testing environments (e.g. ECU configuration).

HSM Server

Hosts certified HSMs for secure key storage and signing.
Executes all encryption, signing, and token generation.
Acts as the cryptographic trust anchor of the system.

Backend API

Handles logic for token issuance and certificate management.
Interfaces with the HSM for cryptographic operations.
Supports integration with CI/CD tools and external workflows.

mTLS Authentication

Ensures only verified users/systems can access services.
Used across GUI and API layers for secure communication.
Certificates are time-limited and require renewal.

CI/CD Integration

Enables automation of PKI operations in DevOps workflows.
Supports token issuance and certificate handling via API.
Aligns with modern software delivery practices (DevSecOps).

Our Suite of Public Key Infrastructure Services

Build & Manage Custom Public Key Infrastructure Services

We offer a fully managed, end-to-end PKI solution tailored to your security, compliance, and integration requirements. This model is ideal for enterprises that want a hands-off approach with maximum assurance. ...

What’s Included:

Infrastructure and backend setup
User management and access control
Custom GUI development (if needed)
Integration with your systems and workflows
Penetration testing and quality assurance
Ongoing PKI support and operations management

HSM as a Service

Our HSM as a Service offering gives your team direct API access to a certified, FIPS-compliant HSM infrastructure — without the overhead of maintaining physical hardware.

Whether you're signing firmware, encrypting telemetry, or issuing certificates, our HSM as a Service forms the secure cryptographic foundation of your public key infrastructure. ...

Features:

API-based key management and crypto operations
Access to certified HSM services
Regular backups, monitoring, and auditing
Ideal for DevSecOps teams and embedded developers
Well-suited for organizations looking for scalable, secure PKI without the overhead of maintaining physical hardware.

Development Support Service

We provide development support through our expert security engineering team for organizations building custom PKI stacks or integrating with existing infrastructure. ...

Key Features:

Architecture consulting for PKI deployment
Hands-on infrastructure provisioning
Support for PKI readiness and compliance assessments

This model is perfect for enterprise teams looking to modernize their certificate management, automate trust workflows, or embed PKI into new products.

Validation & Penetration Testing Service

As part of our holistic security model, we provide penetration testing and validation services to ensure the resilience of your PKI environment. ...

Scope Includes:

Comprehensive PKI validation across backend systems, integration and service layers, and client-side components
API-level penetration testing
End-to-end validation of identity, certificate, and key lifecycle management

reporting with prioritized findings and remediation planning. These services are available as part of your Public Key Infrastructure Services engagement or as a standalone security validation initiative.

Support & Maintenance Service

Security doesn’t stop at deployment. Our Support & Maintenance offerings ensure long-term reliability and operational readiness. ...

Service Elements:

On-call and SLA-backed technical support
Certificate expiration tracking and renewal workflows
Patch management and infrastructure monitoring
Scalable as your deployment grows across devices and geographies

Deployment Models for Public Key Infrastructure Services

01

Fully Managed Development Model

In this model, our team handles the entire PKI lifecycle — from architecture and infrastructure provisioning to certificate management and compliance.

You get a turnkey, compliant, and fully supported PKI solution, managed by our security team.

02

Client-Driven Development Model

Your internal team builds your own PKI stack on top of diconium’s secure HSM services, APIs, and infrastructure.

We provide the cryptographic core; you own the application logic and user experience.

This model offers full flexibility while leveraging the trust foundation of our HSM as a Service backend.

Public Key Infrastructure Services – Capability Overview

Feature	Build & Manage Custom Service	HSM as a Service	Development Support Service	Validation & PenTests Service	Support & Maintenance Service
Infrastructure Provisioning	✓		✓
Backend Development	✓		✓
Custom GUI (if needed)	✓		✓
User & Access Management	✓		✓
API Access to HSM		✓
Crypto Services & HSM SupportM		✓		✓
Backup & Monitoring		✓		✓
Development Support			✓
PKI Validation (Service / APIs / Identity & Key Mgmt)	✓		✓	✓
Ongoing Support & Maintenance	✓	✓			✓

Success Stories: Public Key Infrastructure Services

Enabling Secure ECU Token Management

To streamline the management of secure ECU testing workflows, we developed PKI as a Service (PKIaas) platform for a leading automotive manufacturer.

The solution replaced manual token generation processes with a web-based system built on certified HSMs, mutual TLS (mTLS), and role-based access controls.

The platform enables the issuance of device-specific security tokens, used to enable or disable ECU features during testing.

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Frequently Asked Questions (FAQs)

How does PKIaaS help my organization?

PKIaaS (Public Key Infrastructure as a Service) provides all the benefits of a full-scale PKI without the overhead of managing infrastructure. It enables scalable PKI deployment, fast PKI certificate management, and seamless integration with enterprise PKI systems.

What is included in HSM as a Service?

HSM as a Service offers secure cryptographic operations such as signing, encryption, and key management using certified HSMs. This service is essential for organizations that need FIPS-compliant HSM services integrated into their PKI architecture.

Do you support signing services as part of your PKI offering?

Yes, we provide signing services as a core part of our PKIaaS platform. This includes support for:

Firmware and software signing
Boot image signing
Over-the-Air (OTA) update packages

All signing operations are executed using certified HSMs to ensure integrity, traceability, and regulatory compliance.

Do you offer consulting for PKI Architecture design?

Absolutely. We offer expert guidance on designing scalable, secure PKI architecture that aligns with your enterprise’s compliance and operational goals. Whether you’re starting fresh or modernizing legacy systems, our consulting helps streamline PKI deployment.

What kind of support is available post-deployment?

We offer ongoing support for PKI certificate management, HSM as a Service maintenance, and overall PKI services operation. Our team ensures long-term success through monitoring, patching, and expert troubleshooting.

Is PKIaaS suitable for small and medium enterprises?

Yes, PKIaaS is highly scalable and adaptable to the needs of small businesses as well as large corporations. It simplifies PKI deployment and management with minimal upfront investment.

Do you offer encryption services through your PKI infrastructure?

Yes. We support encryption workflows for telemetry, OTA images, and other sensitive data. Encryption is integrated into our certificate management system and backed by our HSM infrastructure to ensure secure, policy-driven operations.

Why is PKI Certificate Management important?

PKI Certificate Management is crucial to ensure the validity, lifecycle control, and security of digital certificates. Our services help automate and centralize certificate renewal, revocation, and monitoring processes across large enterprise PKI deployments.

How do HSM services differ from traditional key storage solutions?

HSM services provide hardware-based, tamper-resistant environments for cryptographic key operations. Unlike software-based storage, HSM services offer enhanced security, compliance readiness, and seamless integration with your PKI certificate lifecycle.

Can PKI Certificate issuance be automated?

Yes, automation is central to our PKI services. We enable fast and secure PKI certificate issuance, reducing manual overhead and human error, and improving digital certificate management efficiency across your organization.

What kind of support is available post-deployment?

Public Key Infrastructure Services

Trusted PKI Solutions for Automotive and IoT Industry

Gunaseelan Sivanandam,

Security Controls Built into Our Public Key Infrastructure Services

Hardware-Based Certificate Signing

Infrastructure Security and Assurance

Standards-Based Compliance and Validation

Isolated and Segmented Infrastructure

Mutual TLS and Credential-Based Authentication