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HP EliteDesk 800 G3 Mini (or equivalent)? You can get them for pretty cheap on eBay.
I have heard that it might be an issue with Peertube’s federation implementation, in that its not properly pushing externally.
Unfortunately, comments, and votes don’t appear to be federating from Peertube. I’ve opened some issues (LemmyNet/Lemmy#4314, LemmyNet/Lemmy#3837, LemmyNet/lemmy-ui#2161) for this in the past, and, from what I’ve heard, it may be an issue with Peertube’s federation implementation.
Correct.
An example of such an attack would a “cold boot attack”.
It sort of depends on how the underlying hardware is designed. You can create a system in which the RAM’s contents are encrypted by the hardware, but at some point the data must be decrypted for use. For example, one could theoretically sniff the data-lines between the RAM, and the CPU. This is all of course ignoring the fact that the hardware, itself, could be compromised i.e. Intel M.E., backdoors/vulnerabilities in the BIOS, etc. There’s lots that can be done to try to mitigate security vulnerabilites, but there is always a tradeoff between security, and convenience.
Maybe the best form of security is memorizing a private key, then manually doing the math with a pen and paper to decrypt some text, and transmit it with a carrier pigeon.