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From: Peter Todd <pete@petertodd.org>
To: Gregory Maxwell <gmaxwell@gmail.com>
Cc: Bitcoin Development <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Bloom bait
Date: Fri, 6 Jun 2014 13:05:24 -0400	[thread overview]
Message-ID: <20140606170524.GA29195@savin> (raw)
In-Reply-To: <CAAS2fgTKiPMPOazNTPL8+3Ov1xOj=H+yK3u+sd_pe=nyDSPgTw@mail.gmail.com>

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On Fri, Jun 06, 2014 at 09:58:19AM -0700, Gregory Maxwell wrote:
> On Fri, Jun 6, 2014 at 9:46 AM, Peter Todd <pete@petertodd.org> wrote:
> > transactions against. Where they differ is that bloom filters has O(n)
> > scaling, where n is the size of a block, and prefix filters have O(log n)
> > scaling with slightly(1) higher k. Again, if you *don't* use brute forcing
> > in conjunction with prefixes they have no different transactional graph
> > privacy than bloom filters,
> 
> Huh? How are you thinking that something that gets put in transactions
> and burned forever into the blockchain that lets you (statically) link
> txout ownership is "no different" from something which is shared
> directly with a couple peers, potentially peers you trust and which
> are run by yourself or your organization?

Again, you *don't* have to use brute-force prefix selection. You can
just as easily give your peer multiple prefixes, each of which
corresponds at least one address in your wallet with some false positive
rate. I explained all this in detail in my original blockchain data
privacy writeup months ago.

-- 
'peter'[:-1]@petertodd.org
000000000000000029d945c3832c7f4afabce11e6cb1c27b6f5e8c0f2bbb356c

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  reply	other threads:[~2014-06-06 17:04 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-06-06  8:19 [Bitcoin-development] NODE_BLOOM service bit Peter Todd
2014-06-06  8:48 ` Adam Back
2014-06-06  9:03   ` Gregory Maxwell
2014-06-06  9:11     ` Peter Todd
2014-06-06  9:04   ` Peter Todd
2014-06-06 10:45     ` Adam Back
2014-06-06 16:46       ` [Bitcoin-development] Bloom bait Peter Todd
2014-06-06 16:58         ` Gregory Maxwell
2014-06-06 17:05           ` Peter Todd [this message]
2014-06-06 17:10             ` Gregory Maxwell
2014-06-06 17:45               ` Peter Todd
2014-06-07 11:22                 ` Mike Hearn
2014-06-07 19:44                   ` Alan Reiner
2014-06-08 21:45                     ` Peter Todd
2014-06-10 10:41                       ` Mike Hearn
2014-06-08 21:35                   ` Peter Todd
2014-06-10 10:38                     ` Mike Hearn
2014-06-10 13:02                       ` Jeff Garzik
2014-06-10 17:08                       ` Peter Todd
2014-06-11  8:57                         ` Mike Hearn

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