Silicon Labs, the world's lowest power wireless solutions company, has pioneered IoT security with a landmark achievement. The company announced that its Series 3 Secure Vault security subsystem, integrated within the SiXG301 System-on-Chip (SoC), is the first in the world to get PSA Level 4 certification.

This prestigious certification—granted by PSA Certified—is the highest level of IoT security ever attained and further reinforces Silicon Labs as an IoT security leader in securing connected devices.

"Security is not an add-on feature that we provide—it's the basis of all that we do," said Silicon Labs' President and CEO Matt Johnson. "Being first to market with PSA Level 4 certification is a strong validation of our IoT security leadership and our focus on driving IoT growth."

What is PSA Level 4 Certification?

PSA Certified launched Level 4 certification with a very strong focus on new physical threats to embedded devices. Level 4 has two categories—iSE/SE (secure elements) and ROT (Root of Trust)—and considers attack vectors that were previously theoretical in nature. They are laser fault injection, side-channel attacks, microprobing, and voltage manipulation. PSA Level 4 certification is to demonstrate that the device is secure against the most advanced tampering methods.

Silicon Labs previously led the market with its MG21 SoC, the first to be PSA Level 3 certified. With the PSA Level 4 added to its portfolio, the company continues its "security-first" approach to innovation in the fast-evolving Internet of Things.

Industry Partnership Paves the Way

To guarantee the SiXG301's strength, Silicon Labs partnered with Keysight Technologies, the global leader in device testing and security validation. Keysight applied advanced techniques such as side-channel analysis and fault injection to extensively test the Secure Vault.

"Keysight is proud to have helped Silicon Labs achieve the world's first PSA Level 4 certification," said Marc Witteman, Keysight Technical Director of Device Security Testing. "Our collaboration shows the importance of third-party certification and the value in testing the boundaries in IoT security."

Built for the Future of IoT

Silicon Labs Series 3 platform, built on a state-of-the-art 22 nm process node, continues the success of Series 2 with even stronger hardware-based security capabilities. The new Secure Vault was designed to last a decade or longer in actual deployment.

With combined over-the-air firmware updates, real-time monitoring of operation, and scalable architecture, the SiXG301 SoC sets a new benchmark for lifecycle security.

Since the global availability of SiXG301 is projected for Q3 2025, the chip will be the first to ship with PSA Level 4 certification, offering confidence to device makers in smart home, industrial IoT, and smart city applications.

Global Compliance Made Easy

As new requirements emerge continuously—including the EU's Radio Equipment Directive (RED) directive, the U.S. Cyber Trust Mark, and the Singapore Cybersecurity Labeling Scheme (CLS)—Silicon Labs is simplifying the process for manufacturers to get on board.

PSA Level 4-certified Secure Vault makes devices ready to be compliant globally, especially when it comes to RED regulations effective from August 1, 2025.

To assist developers in maintaining their lead, Silicon Labs will present a webinar entitled "Stay Ahead of Global IoT Security Regulations with Silicon Labs." It will discuss how to incorporate RED-compliant security features on the Series 3 platform.