One of those countries is the US. Fax is unencrypted analog. If practice, tgis is ver certainly not secure. It's only "more secure" in the sense that unauthorized access to it counts as wiretapping, whereas the feds carved a loophole allowing them to read private emails without going afoul our anti-wiretapping laws. That you don't see the absurdity means our educational system is also doing what feds built it to do.