[jrochkind1]

What industry do you mean by "this industry"? Just... computing?

I didn't know OpenPGP was used to authenticate OS updates for most servers today. Can you give me a place to find out more about that; are you talking about a specific OS?

[somedude11]

Packet managers on pretty much every Linux distribution use GPG for verifying packages.

[aptmiguk]

It's used to digitally sign software, not encrypting.