Reporting a security problem
If you find a way to harm a player, their machine or their account through Phaethon, write to security@playphaethon.com rather than posting it anywhere public. Say what you found, where, and how to reproduce it, and include the version of the launcher or the runtime if it is one of those.
This covers the launcher and its installer, the runtime and its tools, this website and its docs, downloads, sign-in and accounts.
Every other problem
A crash, a bug, or a place where the port and the console disagree goes through the report page, or to hello@playphaethon.com if you can't sign in.
What you can check yourself
The launcher, its installer and its updater are signed, so Windows names their publisher.