Industry giants unite for the Matter protocol

For the first time, industry giants such as Apple, Amazon, Google, Samsung, and others have come together to establish a common set of standards (governed by Connectivity Standards Association (CSA)).

This collaborative effort ensures secure and reliable interoperability across smart home devices, mobile apps, and cloud services.

It's not a replacement for existing platforms but serves as a universal method for devices and platform providers to communicate securely and reliably.


Industry Giants Unite for the Matter Protocol | Nexus Group


  • Security
  • Reliability
  • Ease of use


How does it work?

The Matter security and certification concept relies on Public Key Infrastructure (PKI) and is overseen by the Connectivity Standards Alliance (CSA) through the Matter Distributed Compliance Ledger (DCL). Here are some key points:

  • The DCL, administered by CSA, publishes the certificates of Product Attestation Authorities (PAAs). These are the approved root CAs of the Matter PKI.
  • PAA operators must implement a series of security requirements and undergo periodic audits
  • Product Attestation Intermediates (PAIs) are subordinate CAs under the PAA and serve exactly one Matter product vendor.
  • PAIs are instrumental in issuing digital Device Attestation Certificates (DAC) for Matter compliant devices
  • Every Matter product manufacturer needs a PAI for the issuance of a DAC for each individual device.)

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Nexus Identities for IoT

Create a secure connected world

With Nexus GO IoT service, you can forge PKI-based trusted identities for smart home devices part of the Matter ecossytem, fostering a secure and interconnected world.

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Frequently asked questions about Matter

We gathered the most commonly asked questions and provided answers.

Why Nexus

Nexus’ platform for IoT PKI has the following key benefits: 

High performance

Guaranteed high performance with a proven capacity to issue 10,000 certificates per second. Offered as a service, guaranteed SLA and capacity as you grow. 


Fulfills automotive requirements by supporting standards, such as the IEEE 1609-2 and ETSI TS 103 097 (V2X) for digital certificate formats and interfaces, C-ITS for vehicle-to-grid (V2G), and ISO 15118 for plug & charge. 

High security

Proven security as Nexus’ quality-assured PKI platform is being certified according to Common Criteria EAL4+, and Nexus’ organization complies with ISO 27001 and TISAX. 

News and Resources

Blog IoT IoT security Matter PKI Smart homes

The Future of Matter Smart Homes

22 February, 2024
Matter represents a significant milestone in the smart home industry, offering a unified standard that promises enhanced interoperability and a seamless user experience across various smart home devices.
Blog CRA Cyber Resilience Act IoT IoT security

Navigating the Cyber Resilience Act: A manufacturer’s roadmap to compliance

16 February, 2024
The Cyber Resilience Act (CRA) is an EU directive currently being deliberated by the European Parliament that aims to enhance the cyber resilience of products with digital elements.
Blog IoT PKI Whitepaper/Guide

Achieving zero-trust for IoT & IIoT with secure device identities

24 October, 2023
In an era where the Internet of Things (IoT) and Industrial Internet of Things (IIoT) dominate, securing connected devices is paramount. Explore our white paper to uncover the power of Zero Trust and Public Key Infrastructure (PKI) in fortifying IoT and II...