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Date: Sun, 3 Jun 2018 19:25:23 -0700 (PDT)
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Subject: Re: Are ssh keys tied to a user or the originating machine?
From: jc091966@gmail.com
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Xref: csiph.com comp.os.linux.security:730

On Saturday, November 21, 2015 at 1:10:09 PM UTC-5, JimR wrote:
> I'm trying to better understand ssh.
> 
> User foo on machine bar generates a keypair, and provides the public key 
> to remote user dokes on machine shme .   foo connects to dokes account 
> at shme, and everything is happy.
> 
> Then user foo also has an account on machine baz.  He takes the private 
> key he generated on machine bar, and copies it to machine baz.  Can he 
> connect to dokes on shme?  My limited testing suggests that it works. 
> Is that a universal truth?
> 
> Next, foo passes his private key to unrelated user thud on machine 
> grunt.  thud installs the private key owned by foo.  Can thud now 
> connect to user dokes on machine shme?
> 
> Next, replace the above ssh keys with PGP keys.  Do the same answers apply?
> 
> Thanks,
> JimR

I just read your post. How about some appropriate names so we all don't have to keep track of whether "shit" refers to a machine or user.
Hopefully someone else responded to this crap, coz I'm ticked off with the extra work deciphering your questions