Every Matter device has to carry its own Device Attestation Certificate (DAC), which a controller checks during setup to confirm the device is genuine and certified. Getting those certificates and their private keys onto each unit is a job of its own for manufacturers. On 20 October 2026 STMicroelectronics launched ST MatterConnect, a service that generates the credentials and loads them into ST secure chips at the factory, before the chips ship. Korean outlet Chosun Biz reported the launch for the local market on 26 October.

What ST does

According to the press release, ST generates and injects the mandatory DAC along with other data such as cryptographic keys, product and version information and customer-specific personalisation. This happens in ST's own certified secure factories. ST is an approved Product Attestation Authority (PAA) and Product Attestation Intermediate (PAI) in the Matter certificate chain, so it can issue the certificates itself. Its service page adds that ST also manages the device entries in the Distributed Compliance Ledger, the shared Matter database of certified products, for the product's lifetime.

The pitch to manufacturers is simple: no need to build a secure provisioning line in-house, and a single supplier for both the chip and the credentials. Sylvain Fidelis, Multi-Market Business Line Manager at ST, says it reduces operational cost and complexity and shortens time to market.

Two chips

The service covers two parts:

  • ST25DA-C, a dynamic NFC tag built for Matter NFC commissioning, where a phone adds the device with a single tap instead of scanning a QR code or typing a pairing code.
  • STSAFE-A120, a secure element connected to the main processor over I2C. It handles Matter device authentication and, more broadly, secure connection setup and integrity checks. It runs on a CC EAL5+ certified platform, and ST says it protects devices from cloning, counterfeiting and malware injection.

In both cases the keys stay in tamper-resistant hardware rather than in the main chip's flash.

What this means for buyers

For people who set up Matter devices at home nothing changes directly, since the certificate check already happens with every device. The service mainly lowers the barrier for smaller makers that want a certified Matter product without running their own key infrastructure. If more of them use NFC tags like the ST25DA-C, tap-to-add setup could become more common. ST has not published pricing or minimum order volumes.