From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1VrA4K-00051O-7A for bitcoin-development@lists.sourceforge.net; Thu, 12 Dec 2013 17:29:00 +0000 Received-SPF: pass (sog-mx-2.v43.ch3.sourceforge.com: domain of gmail.com designates 74.125.82.175 as permitted sender) client-ip=74.125.82.175; envelope-from=prabahy@gmail.com; helo=mail-we0-f175.google.com; Received: from mail-we0-f175.google.com ([74.125.82.175]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1VrA4I-0008LG-Vz for bitcoin-development@lists.sourceforge.net; Thu, 12 Dec 2013 17:29:00 +0000 Received: by mail-we0-f175.google.com with SMTP id t60so768347wes.6 for ; Thu, 12 Dec 2013 09:28:52 -0800 (PST) X-Received: by 10.194.173.163 with SMTP id bl3mr7714436wjc.10.1386869332423; Thu, 12 Dec 2013 09:28:52 -0800 (PST) MIME-Version: 1.0 Received: by 10.216.161.197 with HTTP; Thu, 12 Dec 2013 09:28:32 -0800 (PST) In-Reply-To: References: From: Paul Rabahy Date: Thu, 12 Dec 2013 12:28:32 -0500 Message-ID: To: Mike Hearn Content-Type: multipart/alternative; boundary=089e013c6220e8bbfc04ed59ad7c X-Spam-Score: -0.6 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. 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[URIs: github.com] -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (prabahy[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 1.0 HTML_MESSAGE BODY: HTML included in message -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-Headers-End: 1VrA4I-0008LG-Vz Cc: Bitcoin Dev Subject: Re: [Bitcoin-development] Merge avoidance and P2P connection encryption X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 12 Dec 2013 17:29:00 -0000 --089e013c6220e8bbfc04ed59ad7c Content-Type: text/plain; charset=ISO-8859-1 First off, nice article. Very clear and informative. I don't know if this is the best place to post this, but it seems related to me. As more wallets implement BIP32, I believe that bitcoin wallets should begin to encourage people to use https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#recurrent-business-to-business-transactions-mi0style address instead of traditional addresses. In the end, this would improve privacy because users never need to merge coin if they had one of these "super addresses". In addition, "super addresses" would fit nicely into BIP70. Right now, the PaymentDetails message allows the merchant to provide multiple outputs. If instead the PaymentDetails provide 1 traditional output (for reverse compatibility) and 1 "super address", the payment could be broken into as many pieces as is needed to match unspent outputs already in the customers wallet. Finally, the refund_to address in Payment could also be upgraded to a "super address" to enhance privacy there. I am not sure if there is a large memory requirement for "super addresses", but to me, it seems that a lot of these privacy enhancing possibilities will be simple to implement once BIP32 is widely deployed. On Thu, Dec 12, 2013 at 11:03 AM, Mike Hearn wrote: > I wrote an article intended for a broad/non-developer audience on a few > Bitcoin privacy topics: > > - P2P connection encryption > - Address re-use/payment protocol > - CoinJoin and merge avoidance > > I don't think there's anything much new here for people who were involved > with the BIP70 design discussions, but it may prove a useful resource when > talking about privacy features in the payment protocol. Specifically the > ability to request multiple outputs and submit multiple transactions that > satisfy them. The article elaborates on how to use that feature to achieve > some useful privacy outcomes. > > I also analyze what using SSL for P2P connections would buy us and what it > wouldn't. > > https://medium.com/p/7f95a386692f > > > ------------------------------------------------------------------------------ > Rapidly troubleshoot problems before they affect your business. Most IT > organizations don't have a clear picture of how application performance > affects their revenue. With AppDynamics, you get 100% visibility into your > Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics > Pro! > http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > > --089e013c6220e8bbfc04ed59ad7c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
First off, nice article. Very clear and informative.<= br>
I don't know if this is the best place to post this, but it seem= s related to me.

As more wallets implement BIP32, I believe that bit= coin wallets should begin to encourage people to use https://github.com/bitcoin/bips/blob/master/bip-0= 032.mediawiki#recurrent-business-to-business-transactions-mi0 style add= ress instead of traditional addresses. In the end, this would improve priva= cy because users never need to merge coin if they had one of these "su= per addresses".

In addition, "super addresses" would fit nicely into BIP70. R= ight now, the PaymentDetails message allows the merchant to provide multipl= e outputs. If instead the PaymentDetails provide 1 traditional output (for = reverse compatibility) and 1 "super address", the payment could b= e broken into as many pieces as is needed to match unspent outputs already = in the customers wallet. Finally, the refund_to address in Payment could al= so be upgraded to a "super address" to enhance privacy there.

I am not sure if there is a large memory requirement for "su= per addresses", but to me, it seems that a lot of these privacy enhanc= ing possibilities will be simple to implement once BIP32 is widely deployed= .


On Thu,= Dec 12, 2013 at 11:03 AM, Mike Hearn <mike@plan99.net> wrote:=
I wrote an article intended for a broad/non-developer audi= ence on a few Bitcoin privacy topics:

- P2P connection e= ncryption
- Address re-use/payment protocol
- CoinJoin = and merge avoidance

I don't think there's anything much new here fo= r people who were involved with the BIP70 design discussions, but it may pr= ove a useful resource when talking about privacy features in the payment pr= otocol. Specifically the ability to request multiple outputs and submit mul= tiple transactions that satisfy them. The article elaborates on how to use = that feature to achieve some useful privacy outcomes.

I also analyze what using SSL for P2P connections would= buy us and what it wouldn't.


-----------------------------------------------------------------------= -------
Rapidly troubleshoot problems before they affect your business. Most IT
organizations don't have a clear picture of how application performance=
affects their revenue. With AppDynamics, you get 100% visibility into your<= br> Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynami= cs Pro!
http://pubads.g.doubleclick.net/gam= pad/clk?id=3D84349831&iu=3D/4140/ostg.clktrk
___________________= ____________________________
Bitcoin-development mailing list
Bitcoin-develo= pment@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bitcoin-de= velopment


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