If someone can break into my home network then they can record anything going over my WiFi network, which is why https is essential and VPN is useful. Now my printer is connected through WiFi, and several devices use it.
Question: Can I expect that the average printer uses some encryption for the data that it receives, or could someone who can listen in to my WiFi collect anything I print and copy it? I just found out my home printer uses “WEP encryption” which I assume can be cracked.
PS Unless I’m very wrong, VPN will not be able to help you in this situation. It could protect what you send to the printer, but can’t protect what the printer receives.