This is an alternative to manually typing your password to decrypt your home server disks.
The idea is that you have a Tang server somewhere on your local network. When your server boots up, it needs to communicate with the Tang server to unlock the disk. Tang doesn’t store the key and is stateless, but the client requires Tang’s cooperation to compute the key.
For me, I’m thinking about someone breaking into my house and stealing my computer. Currently, I have LUKS read a keyfile from a USB drive… but I almost always leave it plugged in… so a thief would probably accidentally steal that too.
With this setup, I’m thinking maybe I could setup a Pi on the opposite side of my house, ideally hidden. And then if my home server gets stolen, LUKS wouldn’t be able to reach my Tang server, and therefore not unlock anything.
Not sure raidproof exists. If they get there and it’s running, all they need is something that is already connected and can read it, so your surface area is huge. If they know you have things they need, and are aware you are technically competent, They’re just going to disconnect network, leave it running and call in pros. Anything is probably enough to get past local LEO, but if the feds come in, they’re going to get what they want unless you’re rolling your own drivers.