CDR: RE: Anonymous Remailers cpunk

[Trei, Peter]

There's no way which can't be spoofed by a determined
opponent willing to send truly weird looking messages
(as I demonstrated in an earler post), but that's not the
point. I suggest that you just look for ascii-armouring - 
ie, long (>50 byte) printable character strings without 
embedded spaces. If the majority of the body has this 
format, then call it encrypted.

And/or look for the standard tag strings for smime or pgp
encrypted text, if you're worried about unencrypted but
uuencoded naughty pictures being sent.

You can't catch everything, but you can do reasonable due
diligence to stop spammers and filter out non-contrived 
unencrypted content. 

Peter Trei


> ----------
> From: 	Tom Vogt[SMTP:tom at ricardo.de]
> Sent: 	Wednesday, October 04, 2000 4:36 AM
> To: 	Trei, Peter
> Cc: 	Multiple recipients of list
> Subject: 	Re: Anonymous Remailers cpunk
> 
> "Trei, Peter" wrote:
> > I would like to suggest that a remailer could eliminate nearly all it's
> > problems by only sending out encrypted mails - that is, if after
> > removing the encryption that was applied using it's own private
> > key, it finds that the result is plaintext, it simply drops the message.
> 
> I like that idea. so much that I might start a remailer with these
> properties, in order to test it out.
> 
> single question left: what is a reliable way to see whether or not a
> text is plain or cipher?
>