Wi-Fi 7's WPA3 Security Comes With Compatibility Catch

The Wi-Fi Alliance's WPA3 security standard for Wi-Fi 7 devices has sparked compatibility concerns with older devices, prompting CableLabs to call for hardware makers to prioritize support for a workaround. Wi-Fi 7 products have been available to buyers for a couple of years now, with the Wi-Fi Alliance starting its certification program for Wi-Fi 7 at the start of 2024.

The Wi-Fi Alliance made WPA3 mandatory on the 6 GHz band used by Wi-Fi 6E and Wi-Fi 7. However, this move may cause compatibility issues with older devices, as many of them are based on Wi-Fi 5 or even Wi-Fi 4 hardware. According to CableLabs, more than 23 billion Wi-Fi devices are in use worldwide, and many of them may not be compatible with the new WPA3 security standard.

To address these compatibility issues, the Wi-Fi Alliance devised WPA3-Personal Compatibility Mode (PCM) and WPA3-Personal Transition Mode. The latter allows an access point to offer WPA2 and WPA3 authentication on the same network, supporting both legacy and newer clients. However, some legacy clients may misinterpret the security options and fail to connect to the access point.

## Why it matters The compatibility issues with Wi-Fi 7's WPA3 security standard can have significant consequences for consumers. If a consumer upgrades to a Wi-Fi 7 router or access point, they may find that some older devices can no longer connect, causing confusion and frustration. CableLabs is warning that attempts to make Wi-Fi 7 access points accommodate older devices can create compatibility problems of their own, and wants hardware makers to prioritize support for the industry's workaround.

## What happens next As the Wi-Fi Alliance continues to promote the adoption of Wi-Fi 7, it is likely that the compatibility issues with older devices will become more pressing. Hardware makers will need to prioritize support for the WPA3-Personal Compatibility Mode and WPA3-Personal Transition Mode to ensure seamless interoperability between new and old devices. Consumers, on the other hand, should be aware of the potential compatibility issues when upgrading to Wi-Fi 7 devices and take necessary steps to ensure that all their devices can connect to the network.