Re: Account from Keyfile

["Stephen Argent" <mailman@tuxcon.com>]

Thanks very much - exactly what I was looking for :) 

On Tuesday, May 23, 2017 17:17 ACST, Colin Percival <cperciva@tarsnap.com> wrote:
 
> On 05/23/17 00:35, Stephen Argent wrote:
> > It does answer my quesetion, yes :) Wasn't sure if there was some hashing
> > magic going on (though I don't know how) that separated the two :P Am I to
> > presume all linking is done server-side - i.e. the key itself doesn't directly
> > contain any information about the account it's tied to?
>
> Correct. Key files contain a machine ID, and those IDs are currently visible
> (albeit not obvious) if you look up your accounting history on the tarsnap
> website; but while that can let you figure out if a machine belongs to your
> account, having someone else's keys won't let you figure out what their
> account is.
>
> Colin Percival
>
> > On Tuesday, May 23, 2017 17:01 ACST, Colin Percival <cperciva@tarsnap.com> wrote:
> >
> >> On 05/22/17 20:33, Stephen wrote:
> >> > Just a quick/simple question (hopefully)! Given a keyfile, can the
> >> > account be determined from said keyfile (either by ourselves, or
> >> > Colin)? Or is the account only used to set up + authorise that key
> >> > file to store on the service, using a one-way only kind of identifier?
> >> >
> >> > Just curious if a keyfile can be used to identify an account, or not
> >> > :)
> >>
> >> I haven't figured out how to bill people for their machines' usage without
> >> knowing which account each machine belongs to. Does that answer your
> >> question? ;-)
> >>
> >> --
> >> Colin Percival
> >> Security Officer Emeritus, FreeBSD | The power to serve
> >> Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
> >
> >
> >
> >
>
> --
> Colin Percival
> Security Officer Emeritus, FreeBSD | The power to serve
> Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid