[tor-relays] Key files encryption methods.

Hi,

As shown on the Tor website, the most important file of Tor is the key files. So is there any efficient way to encrypt those files in order to prevent anyone else, i.e. Hosting provider, getting and reading them?

Is that those key files are only loaded when the Tor start and reload? So could it be possible to decrypt the file before the start-up and encrypt them again after the Tor start-up process is complete?

Cheers,

Tony