Secure Vault achieves PSA Certified Level 3 status Silicon Labs has officially become the worldâs first silicon innovator to achieve PSA Certifiedâs highest level of IoT hardware and software security protection. PSA Certified is a well respected security body for Internet of Things (IoT) hardware, software and devices co-founded by Arm and has awarded PSA Certified Level 3 status to Silicon Labsâ EFR32MG21, a wireless SoC with Secure Vault. Secure Vault, which delivers the stringent security software and PUF hardware requirements as defined by PSA Certified Level 3, looks to significantly reduce the risk of IoT ecosystem security breaches and the compromise of intellectual property or revenue loss from counterfeiting.