Fw: Garbled passthru mix key (Mixmaster ate my messages!!)

[Carlos Macedo Gomes]

The problem w/ the mix chains is being sparesly discussed on the
remailer-operator list (see enclosed email below).

No ETR as of 2001/03/06 for down chain:
http://www.publius.net/mixmaster-list.html

--
gomes at navigo.com
Carlos Macedo Gomes
_sic itur ad astra_
1;

----- Original Message -----
From: "Computer Cryptology" <turing at eskimo.com>
To: "cmeclax po'u le cmevi'u ke'umri" <cmeclax at ixazon.dynip.com>
Cc: "Remailer Operators Mailing List" <remailer-operators at anon.lcs.mit.edu>
Sent: Tuesday, March 06, 2001 7:11 PM
Subject: Re: Garbled passthru mix key


> -----BEGIN PGP SIGNED MESSAGE-----
>
> On Tue, 6 Mar 2001, cmeclax po'u le cmevi'u ke'umri wrote:
> > de'i Tue, 06 Mar 2001 la cmeclax po'u le cmevi'u ke'umri cusku di'e
>
> > > Turing and I have been doing some tests and have found that when
> > > passthru sends his key through lucifuge, austria, and
> > > perhaps cyggy or randseed, the key is
> > Randseed is the culprit, though cyggy should be aware that his key
> > may suffer the same fate.
>
> To summarize, the key from passthru2 passes without problem through
> afpress, dizum, farout, frog2, green, gretchen, lefarris, lsd,
> shinn, steeleye, winter, and xganon.  It has the middle missing when
> it passes through austria, lucifuge, and randseed.
>
> I'm attaching at the bottom the key as lucifuge delivers it.  The
> "[...]" is *not* my edit, but the problem.
>
> In June (on or around the 25th) of last year Peter posted this
> problem to APAS. At the time, though, dizum was modifying keys.
> Someone then posted a code change for Mix, that exempted Mixmaster
> keys from the binary detection the same way that PGP keys are
> exempt.  Does someone still have that code change?  Can austria,
> lucifuge, and randseed be patched, or should we warn middle
> remailers?  Those that don't send directly might want to avoid
> chaining Mix keys through these remailers otherwise.
>
> -----BEGIN PGP SIGNATURE-----
> Version: PGPfreeware 6.5.8 for non-commercial use <http://www.pgp.com>
>
> iQEVAwUBOqV8VDzxF7DEd0ehAQHujQgAmBSzThaV66SB3/1z6wT0WUQezXiy/epq
> FhamGnIvlXg+IIaU3uV9KkkOxU4QxEdsoZicso5OOPZYYgqt3Lh377p4ztbDKYw1
> 5laLpZucbbKRyaqQ4NsEfopJx1f4aKhH0XtVgBRbENAD6+VuvjyQ5D1YTeTzQ4Iy
> YJJkjapIHbBZT+jztyCTKAj/BMObvrhri/mUc7BJXOFFrUhpgqzMwfjP5sDCBOpF
> cuXc/nI3DZegG5labuUj6sckyEZR+d/Y84SR9Rxw842on32jmcDka4ryFSGvJ/Tm
> jfh4kuJHY1IEfEBMtrZmw5WDp9kp8x+BmV10OXH9Ctsk5wkbZ8/1eA==
> =Zzj9
> -----END PGP SIGNATURE-----
> --
> Computer
> Cryptology
> RSA Fingerprint = 2476BB9C15F3612778C53A87F915CA1D
>
> >From nobody at harrisherd.com Tue Mar  6 15:57:50 2001
> Date: Tue, 6 Mar 2001 02:18:58 -0500
> From: Anonymous <nobody at harrisherd.com>
> To: turing+passthru2=remailer-key=983854611 at eskimo.com
> Subject: Mixmaster key for Passthru's 2nd incarnation
>
> Here is the public key for Passthru's 2nd incarnation:
>
> =-=-=-=-=-=-=-=-=-=-=-=
> passthru2 mixer at immd1.informatik.uni-erlangen.de
c07b204924a69939651ec445fd5b2404 2.0.4b40 MC
>
> -----Begin Mix Key-----
> c07b204924a69939651ec445fd5b2404
> 258
> AATAD7wE2XqELmZ7SHVtuPQjDOjVjhIrXpL5j5Gs
> 7xEi6GXvCOS4vWyzmmZiTQjIimpBv4+PeyAAk6bm
> pBRHqSyXzf4SkZAzqxpqOmBn9nTC8ML3wmFuMsZU
> [...]
> AAAAAAAAAAAAAAAAAAAAAQAB
> -----End Mix Key-----
>
>
>
>