On Thu, 7 Oct 2010, Ricky Zhou wrote:
> On 2010-10-07 07:25:47 PM, Mike McLean wrote:
> > On Thu, Oct 7, 2010 at 5:51 PM, Paul Wouters <p...@xelerance.com> wrote:
> > > I have one and I've played with it in fedora. There is however an
> > > important
> > > catch. The server and the yubikey share the same AES symmetric key. This
> > > means
> > > that if the yubikey is used for multiple sites by one user, that user is
> > > sharing
> > > is his "private key" over various external sites.
> > >
> > > So if fedoraproject would accept it, and the same user uses this yubikey
> > > for
> > > another site, and that other site gets hacked, then fedoraproject could be
> > > hacked as well.
> > >
> > > I guess in a way it is like using the same password, but people might not
> > > be
> > > thinking of that when they have a "device" on them that they use.
> >
> > Wow, that's a serious weakness. Are we sure about this?
> In order for this to happen, the user would have to explicitly take down
> the generated AES key while it is being written to the key and then
> submit it to the other site. I don't think this is really something we
> need to worry about.
>
I had this atack in mind when I designed the burn script. The key never
touches the drive during the burning process s othe attack window here,
while real, is very tiny. Certainly safer then typing your username and
password everywhere all the time :)
-Mike
--
devel mailing list
devel@lists.fedoraproject.org
https://admin.fedoraproject.org/mailman/listinfo/devel
