Great Circle Associates Firewalls
(July 1995)
 

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Subject: Re: Proxy Authentication in Netscape Proxy Server
From: peter @ nmti . com (Peter da Silva)
Date: Sat, 29 Jul 1995 20:58:41 -0500 (CDT)
To: jct @ edelweb . fr (Jean-Christophe Touvet)
Cc: pwtyeung @ ha . org . hk, firewalls @ GreatCircle . COM
In-reply-to: <199507281711 . TAA17630 @ champagne . edelweb . fr> from "Jean-Christophe Touvet" at Jul 28, 95 07:11:41 pm

>  then a popup is displayed, asking for username/passwd. What is entered by the
> user is uuencoded and sent back to the proxy, using Proxy-authorization header.

Eep! Totally subject to snooping/replaying attack!

The basic mechanism of sending an encrypted token as the challenge to be
decrypted by the password (like Kerberos does) is so well known, why didn't
they use it?


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From: peter @ nmti . com (Peter da Silva)
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