From: Arun Mehta <amehta@giasdl01.vsnl.net.in>
Date: Sun, 14 Jul 1996 20:33:39 +0800
To: Harry Hochheiser <harry@tigger.jvnc.net>
Subject: Re: ANNOUNCEMENT: PGPfone Beta 7 Now Available for Download
In-Reply-To: <199607131454.AA13554@tigger.jvnc.net>
Message-ID: <Pine.OSF.3.91.960714123249.32693A-100000@giasdl01.vsnl.net.in>
MIME-Version: 1.0
Content-Type: text/plain


On Sat, 13 Jul 1996, Harry Hochheiser wrote:

> On 12 Jul 96 at 21:31, Arun Mehta wrote:
> 
> >VSNL, my government-owned
> > ISP (which also has a monopoly on all international traffic) made me
> > sign that I will not use my Internet connection for voice traffic.
> > Is there any way they could find out if I were using PGPfone, or
> > rather, could I prevent them from finding out? 

> Most Internet telephony systems use UDP packets to transfer speech, 
> since the lower overhead of UDP (as opposed to TCP) allows for better 
> throughput.      I assume (but I'm not certain) that PGPfone works 
> the same way.
> 
> Unfortunately, most of your other TCP/IP communication will be based 
> on TCP packets.  Therefore, it's theoretically possible for your ISP 
> to monitor your traffic, watching for large numbers of UDP packets.  

Thanks for the input.

Is UDP used for other purposes not related to voice that I might pretend 
to be doing? Or is there still some way of fooling them?

Arun

> 
> 
> 
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> Harry Hochheiser           harry@tigger.jvnc.net
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