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Re: Patent Application 683624

2004-09-16 22:55:12

On Thu, 2004-09-16 at 19:17, Meng Weng Wong wrote:
On Thu, Sep 16, 2004 at 09:20:41AM -0700, william(at)elan.net wrote:
| > US - Title: "Reducing Unwanted And Unsolicited Electronic Messages By 
| > Preventing Connection Hijacking And Domain Spoofing", Serial no. 10/684020
| 
| This patent got published today, to see it try using this url:
| 
http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PG01&s1=684020.APN.&OS=APN/684020&RS=APN/684020
| If does not work go to http://appft1.uspto.gov/netahtml/PTO/search-bool.html
| and type 684020 for Application Serial Number in field1. 

Application Serial Number 10/683624 may also be of interest
to this working group.

"Reducing Unwanted and Unsolicited Electronic Messages by
Exchanging Electronic Message Transmission Policies and
Solving and Verifying Solutions to Computational Puzzles"

From their presentation, the concept was to impose about a 16 second
additional CPU message burden for the sender.  Their statement was such
additional overhead doubled the cost of equipment for the sender.  This
does not consider that many abusive senders control millions of Window
machines with hidden Trojan proxies and never pay for their use. 
Instead of deploying 50,000 machines, this puzzle may require 100,000. 
With each machine costing them $0.00, even doubling CPUs will not affect
the abuser's costs of sending to the same extent it will for legitimate
senders.

It does bring up the issue of cost for a maximal 200 second receiver
burden for resolving Sender-ID or SPF records.  With a common spammer
technique of using random sub-domains, this will keep filters guessing
and the DNS resolvers scrambling for records.  It would seem
illegitimate senders win in any war of escalated overheads.  If only
these innovators would properly handle a temp error, we could slow
unknown senders without punishing legitimate senders. ; )

-Doug