This use case has much more inherent security than your average internet-connected server, because the AI uses the documents in a way that not only resides exclusively in RAM (except for what could theoretically be in swap and hibernate files momentarily, but you can disable those from the operating system) but is there in a way that would be incredibly difficult to reconstruct. Only the absolute highest tier of hackers could manage this. That is, IF you have the self-discipline to manually load the files from a memory stick when you boot the server, and then remove the stick. Which in the case of Linux is not terribly often. But eventually you will start feeling lazy, put them in your root home directory "which is almost certainly totally secure" and make the Linux boot process read in the data automatically on startup. At that point, you are operating at average security.
Apple has built an incredible piece of cloud infrastructure to solve this very problem: https://security.apple.com/blog/private-cloud-compute/
This use case has much more inherent security than your average internet-connected server, because the AI uses the documents in a way that not only resides exclusively in RAM (except for what could theoretically be in swap and hibernate files momentarily, but you can disable those from the operating system) but is there in a way that would be incredibly difficult to reconstruct. Only the absolute highest tier of hackers could manage this. That is, IF you have the self-discipline to manually load the files from a memory stick when you boot the server, and then remove the stick. Which in the case of Linux is not terribly often. But eventually you will start feeling lazy, put them in your root home directory "which is almost certainly totally secure" and make the Linux boot process read in the data automatically on startup. At that point, you are operating at average security.
As they say "security is a process", not a state. Being secure means constantly not doing things the easy way, because of the side effects.