Quantum computers could threaten today’s utility networks. A next-generation wireless standard aims to stay ahead with new security designed for the post-quantum era.
As cyber threats evolve with advances in quantum computing, the Wi-SUN Alliance is preparing its wireless networking standard for the next generation of security. The alliance has confirmed that its upcoming specification will introduce post-quantum authentication mechanisms while strengthening device security for critical infrastructure networks.
In a recent conversation, Wi-SUN Alliance CEO and President Phil Beecher said the alliance is already working on the next version of the specification, with post-quantum security emerging as a key priority driven by utility industry requirements.
According to Phil, the AES encryption currently used by Wi-SUN for message encryption is already regarded by the US National Institute of Standards and Technology (NIST) as resistant to attacks from quantum computers. However, the alliance is now focusing on upgrading the authentication process, which verifies the identity of devices before they join a network.
“We’re currently working on the specification for the next iteration, and we’re seeing a definite requirement from utilities to protect against post-quantum attacks,” Phil said. He added that the alliance is likely to adopt ML-KEM, one of NIST’s standardised post-quantum cryptographic algorithms, for device authentication.
The move comes as utilities increasingly deploy wireless networks to connect millions of smart meters, sensors and grid automation devices. Unlike consumer IoT applications, these networks are expected to remain operational for decades, making long-term cybersecurity a critical design consideration.
Phil explained that every Wi-SUN device already undergoes certificate-based authentication before joining a network. Each device carries a digital identity installed during manufacturing and is verified through a secure authentication server before being allowed to communicate. Firmware updates are also digitally signed so that devices can reject unauthorised software, preventing attackers from installing malicious firmware.
Beyond post-quantum authentication, the alliance is also modernising its security architecture by updating device authentication protocols, evaluating newer security algorithms and improving mechanisms for identifying and removing compromised devices from operational networks.
According to Beecher, the alliance continuously monitors cybersecurity developments and aligns its roadmap with evolving recommendations from NIST to ensure Wi-SUN networks remain suitable for critical infrastructure applications.
The security enhancements are part of a broader technology roadmap that also includes support for distributed energy resources, improved routing for grid automation, and expanded capabilities for emerging smart utility applications.
