Silicon Labs has announced that its Series 3 Secure Vault security subsystem on the SiXG301 SoC, the first in its Series 3 portfolio, has achieved the world’s first PSA Level 4 certification. This achievement affirms Silicon Labs’ commitment to security and embedding trust at the core of connected technology.
“Security isn’t just a feature – it’s foundational to everything we develop,” said Matt Johnson, President and CEO of Silicon Labs. “Being the first to achieve PSA Level 4 certification is a powerful validation of our leadership in IoT security and our focus on accelerating IoT growth.”
PSA Certified introduced the Level 4 certification and its two designations – iSE/SE for secure elements and ROT for Root of Trust – to address the rising complexity and sophistication of attacks on embedded devices. Level 4 stands apart as it validates resilience against laser fault injection, side-channel attacks, microprobing, and voltage manipulation; threats that were theoretical but now are a reality.
Silicon Labs has a history in achieving PSA milestones. The company’s MG21 SoC was the world’s first to earn PSA Level 3 certification, setting new benchmarks in protection against physical tampering and setting the stage for this next step towards Level 3.
Silicon Labs worked with Keysight Technologies to validate Secure Vault on Series 3. Their experts noted the partnership with Silicon Labs’ engineering team, who demonstrated their deep technical expertise and adaptibility throughout the audit process.
“Keysight is proud to have supported Silicon Labs in achieving the world’s first PSA Level 4 certification,” said Marc Witteman, Technical Director, Keysight Device Security Testing, Keysight Technologies. “Our advanced testing methodologies, including side-channel analysis and fault injection, were instrumental to validating the Series 3 Secure Vault on the SiXG301’s resilience against today’s most sophisticated threats. This milestone reflects our commitment to helping innovators like Silicon Labs meet the highest levels of security assurance and regulatory readiness in a rapidly evolving IoT landscape.”
As governments around the world bring in new regulations like the EU’s Radio Equipment Directive (RED) – which was in force as of 1 August, 2025 – the Cyber Resilience Act (CRA), the US Cyber Trust Mark, and Singapore’s Cybersecurity Labelling Scheme (CLS), Silicon Labs is ready to support device makers align with these mandates.
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