DOCSIS 3.0 and Multicast

Phil Karn karn at
Fri Nov 29 21:49:43 UTC 2013

On 11/29/2013 01:11 PM, Jay Ashworth wrote:
> ----- Original Message -----
>> From: "Phil Karn" <karn at>
>> I've been trying to think of ways to thwart large scale traffic
>> analysis, and in a unicast network it's really not easy without a lot
>> of extra traffic (think TOR).
> Well, in a story in MIT Tech Review this week, it's mentioned that IETF is
> considering baking TOR into the base level of the Internet, so if (like me)
> you think that's a pretty unmanageable, inefficient approach, you might want
> to chime in now...

Well, it's inefficient compared to direct unicasting but I can't think
of a much better way to do it. And if you really want security against
dragnet surveillance, and I think we do, we'll find a way to manage it.

Hey, it's not like fiber bandwidth and CPU cycles are hard to find these

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