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Re: [Sip] draft-jennings-sip-hashcash-01

Cullen Jennings <fluffy@cisco.com> Wed, 02 March 2005 20:31 UTC

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Date: Wed, 02 Mar 2005 12:28:42 -0800
Subject: Re: [Sip] draft-jennings-sip-hashcash-01
From: Cullen Jennings <fluffy@cisco.com>
To: Henning Schulzrinne <hgs@cs.columbia.edu>, Michael Thomas <mat@cisco.com>
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Presumable these services would be white listed and use Identity.


On 3/2/05 10:59 AM, "Henning Schulzrinne" <hgs@cs.columbia.edu> wrote:

> Also, applications like "reverse 911" (community emergency alert
> systems) would be severely hampered by such approaches. With verifiable
> source domains and domain-level trust mechanisms, I think we have better
> tools at hand that don't require the 'make everyone suffer' approach.
> 
> Michael Thomas wrote:
>> The big problem I have with hashcash is the advent of
>> zombie armies. With them in mind, about them only
>> thing you do is punish legitimate UA's with itsy-bitsy
>> CPU's, and leave the spammers essentially unaffected
>> with their near limitless CPU resources.


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