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Multiple PSK: A Mechanism for Per-Device Access Control of Wi-Fi Networks

Multiple PSK is a useful mechanism for per-device access control of Wi-Fi networks. Most multiple PSK systems are designed to use the wireless controller or cloud service as the source of truth for all credentials. In some cases, it is superior to use external credential databases for multiple PSK. One would think that this would be a simple matter of transmitting the requested SSID and passphrase to a RADIUS server. This is not workable, given the design of WPA2. In this article we discuss how multiple PSK works with credential databases that are distinct from the wireless controller.

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