That’s a great question, and I used to have the same concern before trying it myself. After doing some research, I found a very detailed explanation on
derekdubois.net. The article breaks down how online fax encryption works, how your files are transmitted, and what you should look for when choosing an app. It recommends using apps that provide end-to-end encryption, automatic file deletion, and verified delivery notifications. I followed their advice and switched to one of the secure apps they mentioned, and I’ve been faxing legal documents and forms for months now without a single issue. What I really appreciated from the guide was how clearly it explains privacy risks and simple steps to protect yourself — like avoiding public Wi-Fi when faxing and enabling PIN protection on your phone. If you value data privacy, that article is one of the most reassuring reads you’ll find.