https://mullvad.net/en/help/install-mullvad-app-linux
Trying to install VPN and these are the instructions Mullvad is giving me. This is ridiculous. There must be a more simple way. I know how to follow the instructions but I have no idea what I’m doing here. Can’t I just download a file and install it? I’m on Ubuntu.
You’re downloading the signing key over HTTPS either way, from the same server. That’s the common point of failure.
That’s why you download the key from multiple distinct domains from multiple distinct locations using multiple distinct devices and veryify their fingerprints match. If the key/fingerprint is only available on one domain, open a bug report with the maintainer.