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Master Public-Key Infrastructures (PKI) for Embedded Systems
Created byMahmoud Saad
Last updated 6/2026
English

What you'll learn

  • Explain the Identity Problem in public key exchange and why PKI is essential to establish scalable, verifiable trust in embedded and automotive systems.
  • Analyze Man-in-the-Middle (MITM) attacks on Diffie–Hellman and raw public key exchange, and understand how PKI prevents them using trust anchors.
  • Describe the structure and roles of PKI components: Root CA, Intermediate CA, Registration Authority (RA), Validation Authority (VA), and HSMs.
  • Understand X.509 digital certificates — their anatomy, certificate chains, trust models (hierarchical, bridge, mesh), and validation logic.
  • Apply PKI to real-world automotive use cases: Secure Boot, OTA firmware updates, ECU-to-ECU authentication, V2X trust, and secure diagnostics.
  • Evaluate PKI challenges including certificate revocation (CRL, OCSP), long vehicle lifetimes, offline operation, and cryptographic agility.
  • Compare PKI with Key Distribution Centers (KDCs) and understand when each trust model is appropriate for embedded and automotive architectures.
  • Understand how modern PKI shifts from identity-only authentication to direct authorization using cryptographically bound credentials.

Course content

4 sections • 24 lectures • 2h 18m total length

  • 01-PKI - Public Key Infrastructure - Overview9:48
  • 02-PKI - Public Key Infrastructure - MITM Attacks on Pub-Key & Diffie-Hellman7:20
  • 03-PKI - Public Key Infrastructure - The Identity Problem3:58
  • 04-PKI - Public Key Infrastructure - Introduction9:14

Requirements

  • Basic understanding of symmetric and asymmetric cryptography concepts (encryption, decryption, public/private keys) is recommended.
  • Familiarity with how digital signatures and hash functions work will help, but key concepts are briefly reviewed before diving into PKI.
  • Basic knowledge of automotive or embedded systems (ECUs, communication buses) is helpful but not mandatory — all examples are explained step by step.
  • No advanced programming or mathematics required. The course focuses on system-level understanding, not algorithm implementation.

Description

The Era of the "Secret Key" is over. The Era of "Managed Trust" is here.

Whether it’s a connected vehicle (V2X), a medical insulin pump, or an industrial sensor on a factory floor, embedded devices can no longer rely on static, hardcoded passwords. Modern security requires a Public Key Infrastructure (PKI).

But you cannot simply "copy-paste" web-based PKI into an embedded device. Constraints like limited flash memory, intermittent connectivity, and 15-year lifecycles change the rules of the game.

Master Public-Key Infrastructure (PKI) for Embedded Systems is a specialized, technical deep-dive designed specifically for engineers who need to design, implement, manage, and audit trust in resource-constrained environments. We bridge the gap between high-level cryptographic theory and low-level hardware implementation.


Why This Course?

Most PKI courses are designed for IT administrators managing web servers. This course is designed for Embedded Engineers managing silicon. We dive into the specific challenges of:

  • Automotive: Secure Diagnostics (UDS), V2X, and ISO 21434 compliance.

  • IoT: Implementing the "Matter" protocol and device-to-cloud identity.

  • Industrial (IIoT): Trust anchors for PLC communication and grid security.

What You Will Master:

  1. The Identity Problem: Moving beyond Diffie-Hellman to authenticated, trusted exchanges.

  2. Embedded X.509: Understanding the anatomy of a certificate and how to strip it down for small footprints.

  3. The Chain of Trust: How to architect Root CAs, Intermediate CAs, and Device Certificates.

  4. The Revocation Nightmare: Solving the CRL vs. OCSP debate for devices that are often offline.

  5. Hardware Integration: How PKI interacts with HSMs, SEs (Secure Elements), and TPMs.

Who this course is for:

  • Automotive and Embedded System Engineers who need to implement or evaluate PKI-based security in ECUs, OTA pipelines, or V2X systems.
  • Cybersecurity Professionals looking to deepen their expertise in PKI trust architectures for IoT, automotive, and embedded domains.
  • IT and DevOps engineers who work with certificates, CAs, and TLS and want to understand how PKI operates in safety-critical embedded environments.
  • Computer science and electrical engineering students seeking practical knowledge of how PKI secures real-world automotive and IoT applications.
  • Anyone with curiosity about cryptography who wants to see how it protects real-world automotive applications.

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