From: Peter Todd <pete@petertodd.org>
To: Mike Hearn <mike@plan99.net>
Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Bloom bait
Date: Sun, 8 Jun 2014 17:35:34 -0400 [thread overview]
Message-ID: <20140608213534.GA4191@savin> (raw)
In-Reply-To: <CANEZrP0BEod6b5joJBMPDv_NAxAh9Kio3aniZ3sH6f9Q4nozpQ@mail.gmail.com>
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On Sat, Jun 07, 2014 at 07:22:56PM +0800, Mike Hearn wrote:
> You can send different bloom filters to different peers too, so I'm not
> sure why you're listing subsetting as a unique advantage of prefix filters.
As I explained in the email you're replying to and didn't quote, bloom
filters has O(n) cost per query, so sending different bloom filters to
different peers for privacy reasons costs the network significant disk
IO resources. If I were to actually implement it it'd look like a DoS
attack on the network.
Essentially with bloom filters you have to make a tradeoff between
scalability and privacy; with prefix filters you don't have to make that
ugly tradeoff. Notably that tradeoff gets worse if we ever increase the
Bitcoin blocksize.
--
'peter'[:-1]@petertodd.org
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next prev parent reply other threads:[~2014-06-08 21:34 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
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 [this message]
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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