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| author | Mike Hearn <mike@plan99.net> | 2013-04-18 11:32:28 +0200 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2013-04-18 09:40:23 +0000 |
| commit | 5d65f5bd70f1e9dea610118da740ee839a802489 (patch) | |
| tree | fcce5f53d1751814f2963879c975cbacbda0b60a | |
| parent | 536dc1d739d8e57acacb2807354d97e0870e49e1 (diff) | |
| download | pi-bitcoindev-5d65f5bd70f1e9dea610118da740ee839a802489.tar.gz pi-bitcoindev-5d65f5bd70f1e9dea610118da740ee839a802489.zip | |
Re: [Bitcoin-development] Anti DoS for tx replacement
| -rw-r--r-- | 21/7e2fde3813a479273c5de228fbb334030a19a2 | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/21/7e2fde3813a479273c5de228fbb334030a19a2 b/21/7e2fde3813a479273c5de228fbb334030a19a2 new file mode 100644 index 000000000..c70c95fa4 --- /dev/null +++ b/21/7e2fde3813a479273c5de228fbb334030a19a2 @@ -0,0 +1,107 @@ +Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] + helo=mx.sourceforge.net) + by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) + (envelope-from <mh.in.england@gmail.com>) id 1USlKJ-00072C-Lw + for bitcoin-development@lists.sourceforge.net; + Thu, 18 Apr 2013 09:40:23 +0000 +Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of gmail.com + designates 209.85.214.179 as permitted sender) + client-ip=209.85.214.179; envelope-from=mh.in.england@gmail.com; + helo=mail-ob0-f179.google.com; +Received: from mail-ob0-f179.google.com ([209.85.214.179]) + by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) + (Exim 4.76) id 1USlKI-0004q3-TI + for bitcoin-development@lists.sourceforge.net; + Thu, 18 Apr 2013 09:40:23 +0000 +Received: by mail-ob0-f179.google.com with SMTP id x4so411896obh.24 + for <bitcoin-development@lists.sourceforge.net>; + Thu, 18 Apr 2013 02:40:17 -0700 (PDT) +MIME-Version: 1.0 +X-Received: by 10.182.101.169 with SMTP id fh9mr5072448obb.2.1366277548337; + Thu, 18 Apr 2013 02:32:28 -0700 (PDT) +Sender: mh.in.england@gmail.com +Received: by 10.76.167.169 with HTTP; Thu, 18 Apr 2013 02:32:28 -0700 (PDT) +In-Reply-To: <20130418092824.GA10184@savin> +References: <CANEZrP1yKeQMayFHsEUWtA3=q+v5rPAutjzEFVVHopPGNZ4jGQ@mail.gmail.com> + <453bfc69-b2ab-4992-9807-55270fbda0db@email.android.com> + <CANEZrP0z6W0ZDsytQ7Rcqb5L6rswn1wv8cbR7c383Dmpzu+gyg@mail.gmail.com> + <CAPaL=UVJd3mdd0bs6Oo9vFHnv_6RbFowjmp0tD-ZbOzZxJEJ3g@mail.gmail.com> + <CANEZrP3ocAJNoQ3xJqRTL8Gz3_T8xsCPPAvSfEOYpPo76wgbig@mail.gmail.com> + <20130418090444.GA30995@savin> <20130418092824.GA10184@savin> +Date: Thu, 18 Apr 2013 11:32:28 +0200 +X-Google-Sender-Auth: QBzFldR6OBwwEyzDkrw89PS7v_s +Message-ID: <CANEZrP1NgAyw_FL0LNHMejL_QcZ5ib2mjvbZ=NqZ0za7vY-L0g@mail.gmail.com> +From: Mike Hearn <mike@plan99.net> +To: Peter Todd <pete@petertodd.org> +Content-Type: multipart/alternative; boundary=e89a8ff1cab4eef24304da9f47e4 +X-Spam-Score: -0.5 (/) +X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. + See http://spamassassin.org/tag/ for more details. + -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 + (mh.in.england[at]gmail.com) + -0.0 SPF_PASS SPF: sender matches SPF record + 1.0 HTML_MESSAGE BODY: HTML included in message + 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: 1USlKI-0004q3-TI +Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net> +Subject: Re: [Bitcoin-development] Anti DoS for tx replacement +X-BeenThere: bitcoin-development@lists.sourceforge.net +X-Mailman-Version: 2.1.9 +Precedence: list +List-Id: <bitcoin-development.lists.sourceforge.net> +List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=unsubscribe> +List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=bitcoin-development> +List-Post: <mailto:bitcoin-development@lists.sourceforge.net> +List-Help: <mailto:bitcoin-development-request@lists.sourceforge.net?subject=help> +List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/bitcoin-development>, + <mailto:bitcoin-development-request@lists.sourceforge.net?subject=subscribe> +X-List-Received-Date: Thu, 18 Apr 2013 09:40:23 -0000 + +--e89a8ff1cab4eef24304da9f47e4 +Content-Type: text/plain; charset=UTF-8 + +> ...and actually, that's not a problem if the defender is online, because +> they can just broadcast the highest sequence numbered tx, which blocks +> further broadcasts by the attacker. + + +Good point - transactions can be ordered by highest version seen before +they're signature checked. Even without that improvement it's still rather +tricky to win the race though. + +I'm intending on making a prototype for myself at some point soon, probably +in bitcoinj. I've been making notes and writing some initial code - I did +successfully replace a transation on my own little testnet, then I figured +I'd submit the patch so it's easier for others to play with it. But I +haven't got the whole thing working end to end yet. + +--e89a8ff1cab4eef24304da9f47e4 +Content-Type: text/html; charset=UTF-8 +Content-Transfer-Encoding: quoted-printable + +<div dir=3D"ltr"><br><div class=3D"gmail_extra"><div class=3D"gmail_quote">= +<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= +x #ccc solid;padding-left:1ex">...and actually, that's not a problem if= + the defender is online, because<br> + +they can just broadcast the highest sequence numbered tx, which blocks<br> +further broadcasts by the attacker.</blockquote><div><br></div><div style>G= +ood point - transactions can be ordered by highest version seen before they= +'re signature checked. Even without that improvement it's still rat= +her tricky to win the race though.</div> +<div style><br></div><div style>I'm intending on making a prototype for= + myself at some point soon, probably in bitcoinj. I've been making note= +s and writing some initial code - I did successfully replace a transation o= +n my own little testnet, then I figured I'd submit the patch so it'= +s easier for others to play with it. But I haven't got the whole thing = +working end to end yet.</div> +</div></div></div> + +--e89a8ff1cab4eef24304da9f47e4-- + + |