RE: RSA Patent Expired

["Richard A. Steenbergen" <ras () e-gerbil net>]

On Wed, 4 Oct 2000, Enkhyl wrote:

> On Wed, 4 Oct 2000, Richard A. Steenbergen wrote:
>
> > On Tue, 3 Oct 2000, Richard Welty wrote:
> >
> > > Bill Fumerola [mailto:billf () chimesnet com] wrote:
> > > > OpenSSH uses RSA for ssh1, so it too benefited greatly
> > > > from RSA's release of the code into the public domain.
> > >
> > > except that nobody should be using ssh1 for _anything_ if they can
> > > possibly avoid it. even the orginal authors of ssh are strongly
> > > advocating
> > > consigning ssh1 to the trash heap of computer security.
> >
> > I think you're confused, ssh1 is still a very valid protocol. It is well
> > tested and proven, and in many cases better implemented then ssh2 (though 
> > of course that may change eventually). Don't confuse the desire to make
> > money with insecurity.
>
> There are known holes in the SSH1 protocol, which is why it is recommended
> that the SSH2 protocol be used.
>
> http://www.securityportal.com/list-archive/bugtraq/1999/Dec/0195.html
>
> The vulnerability is non-trivial to exploit, but it is a flaw. See the
> reference in the above link.

Hence the addition of a strong MAC in ssh2. This is a pretty difficult
attack to pull off, but I'll agree its handled better in ssh2.

-- 
Richard A Steenbergen <ras () e-gerbil net>   http://www.e-gerbil.net/humble
PGP Key ID: 0x138EA177  (67 29 D7 BC E8 18 3E DA  B2 46 B3 D8 14 36 FE B6)