Is your Wi-Fi secured if your IPad and your iPhone X is connected to Private Address?

The new Private Address feature causes the device to “spoof” a randomly generated MAC (i.e., hardware) address for its network interface, which it will use for the connection to currently used WiFi network instead of using its own “burned-in” (unchangeable) MAC address.

This mechanism makes tracking of the device between different WiFi networks much more difficult - as the device will use a different (random) Private Address for each network.

This privacy feature will not prevent connection to a WiFi network unless MAC-address filtering is used - which only permits specific devices to connect. This is an outdated and ineffective security mechanism that is now rarely used.

Other than manipulating the hardware address, no other security or encryption is affected.

MyApPlE2017YeAH wrote:

Do I then remove the WiFi network and start over? I’m not sure what password to use? Is it the one for my WiFi network?

No changes are required to a typical residential or small-business network.

No network removal and no re-addition is required on the Mac, iPhone, iPad, or other Wi-Fi client.

With a Wi-Fi network using a password, the network name and password are required for access. Nothing more.

The media access control address randomization mechanism is only a factor when the network administrator has selected and enabled MAC-based tracking. Few residential and few small business networks use that particular (mis)feature. And that (mis)feature provides negligible security, given the ability to spoof the media access control address.