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 ecosytem, 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 Matter PKI has the following key benefits: 

Approved PAA

Nexus is an Approved Matter Product Attestation Authority and operates a compliant PKI service. Our Matter Root CA certificate in the CSA Distributed Compliance Ledger (DCL).

Smooth onboarding​

Onboard easily to the Nexus PKI Matter service and start issuing Device Attestation Certificates (DAC) to your Matter devices. No need to build and operate a compliant PKI in-house.

European provider​

Swedish company, with French state-owned IN Groupe as the owner. Data centers for managed services in Sweden, Europe.

News and Resources

Blog IoT Matter PKI Smart homes Whitepaper/Guide

[Technical White Paper] Device Attestation with Matter PKI

8 May, 2024
Curious about how Matter ensures compliance and tackles counterfeiting of your products? Read our technical whitepaper to know more!
Blog IoT IoT security PKI Zero Trust

Safeguard Telecom’s last mile – Customer Premises Equipment – with PKI

7 May, 2024
MNOs, ISPs, and CPE manufacturers need to fortify CPE devices to ensure last-mile security for telecom networks. Discover how PKI can help.
Blog Connected vehicles IoT IoT security

Steering the Course of Cybersecurity in the Automotive Industry with PKI 

2 May, 2024
Steering the Course of Cybersecurity in the Automotive Industry with PKI. Learn more on the topic in Nexus latest blog here.