From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from <startithub@gmail.com>) id 1Vdl2p-0003lH-7U for bitcoin-development@lists.sourceforge.net; Tue, 05 Nov 2013 18:08:03 +0000 Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.212.182 as permitted sender) client-ip=209.85.212.182; envelope-from=startithub@gmail.com; helo=mail-wi0-f182.google.com; Received: from mail-wi0-f182.google.com ([209.85.212.182]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1Vdl2o-000890-1i for bitcoin-development@lists.sourceforge.net; Tue, 05 Nov 2013 18:08:03 +0000 Received: by mail-wi0-f182.google.com with SMTP id ez12so2502361wid.15 for <bitcoin-development@lists.sourceforge.net>; Tue, 05 Nov 2013 10:07:55 -0800 (PST) MIME-Version: 1.0 X-Received: by 10.194.5.7 with SMTP id o7mr18708261wjo.17.1383674875866; Tue, 05 Nov 2013 10:07:55 -0800 (PST) Received: by 10.216.208.67 with HTTP; Tue, 5 Nov 2013 10:07:55 -0800 (PST) In-Reply-To: <CANEZrP0itd3xW7yyg9FBJVuJNttcmMhnqWGOaWxjz37ATrR8qA@mail.gmail.com> References: <CABT1wWkOukEzxK5fLbnA4ZgJGN1hb_DMteCJOfA13FE_QZCi=Q@mail.gmail.com> <20131105170541.GA13660@petertodd.org> <20131105171445.GA13710@petertodd.org> <CABT1wW=XgDfxfxMxyjcNhtNTzXkGLtgSLz3JJcUAq9ywgpymyg@mail.gmail.com> <CANEZrP0itd3xW7yyg9FBJVuJNttcmMhnqWGOaWxjz37ATrR8qA@mail.gmail.com> Date: Tue, 5 Nov 2013 19:07:55 +0100 Message-ID: <CADre0dm0PGARSXXdwoa1ZOnpbEw_bx0aKP17q4PSFLTayyoRJw@mail.gmail.com> From: Alessandro Parisi <startithub@gmail.com> To: Mike Hearn <mike@plan99.net> Content-Type: multipart/alternative; boundary=047d7b5d8d4575f8fb04ea71e9da X-Spam-Score: -0.6 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. 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[URIs: doubleclick.net] -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 (startithub[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: 1Vdl2o-000890-1i Cc: Ittay <ittay.eyal@cornell.edu>, Gavin Andresen <gavin@bitcoinfoundation.org>, =?ISO-8859-1?Q?Emin_G=FCn_Sirer?= <egs@systems.cs.cornell.edu>, Bitcoin Dev <bitcoin-development@lists.sourceforge.net> Subject: Re: [Bitcoin-development] BIP proposal - patch to raise selfish mining threshold. 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: Tue, 05 Nov 2013 18:08:03 -0000 --047d7b5d8d4575f8fb04ea71e9da Content-Type: text/plain; charset=ISO-8859-1 I agree with Ittay: when bugs are found, they must be fixed ASAP, expecially when they affect a sensitive sw such as Bitcon; in IT security, every flaw that is exploitable in abstract, is going to be exploited in real, sooner or later, also taking into account the increasing parallel computing power; beware of false sense of security WebSite: http://www.startithub.com Per rimanere aggiornato in merito a Startup, Innovazione e Normativa di settore, sottoscrivi la nostra newsletter: http://www.startithub.com/blog/sottoscrivi-newsletter/ 2013/11/5 Mike Hearn <mike@plan99.net> > On Tue, Nov 5, 2013 at 6:43 PM, Ittay <ittay.eyal@cornell.edu> wrote: > >> The attack can be easily hidden. And be sure that before today, today, >> and after today, very smart people are at their computer planning attacks >> on Bitcoin. Exploits must be published and fixed FAST. >> > > I think it would be helpful if you actually implemented and pulled off > this attack, by becoming the dominant miner capable of reversing spends at > will. Then we'd know how quickly it can be done. > > > > > > ------------------------------------------------------------------------------ > November Webinars for C, C++, Fortran Developers > Accelerate application performance with scalable programming models. > Explore > techniques for threading, error checking, porting, and tuning. Get the most > from the latest Intel processors and coprocessors. See abstracts and > register > http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > > --047d7b5d8d4575f8fb04ea71e9da Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr">I agree with Ittay: when bugs are found, they must be fixe= d ASAP, expecially when they affect a sensitive sw such as Bitcon; in IT se= curity, every flaw that is exploitable in abstract, is going to be exploite= d in real, sooner or later, also taking into account the increasing paralle= l computing power; beware of false sense of security</div> <div class=3D"gmail_extra"><br clear=3D"all"><div><div dir=3D"ltr">WebSite:= <a href=3D"http://www.startithub.com" target=3D"_blank">http://www.startit= hub.com</a><br>Per rimanere aggiornato in merito a Startup, Innovazione e N= ormativa di settore, sottoscrivi la nostra newsletter:=A0<a href=3D"http://= www.startithub.com/blog/sottoscrivi-newsletter/" target=3D"_blank">http://w= ww.startithub.com/blog/sottoscrivi-newsletter/</a></div> </div> <br><br><div class=3D"gmail_quote">2013/11/5 Mike Hearn <span dir=3D"ltr">&= lt;<a href=3D"mailto:mike@plan99.net" target=3D"_blank">mike@plan99.net</a>= ></span><br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex= ;border-left:1px #ccc solid;padding-left:1ex"> <div dir=3D"ltr"><div class=3D"im">On Tue, Nov 5, 2013 at 6:43 PM, Ittay <s= pan dir=3D"ltr"><<a href=3D"mailto:ittay.eyal@cornell.edu" target=3D"_bl= ank">ittay.eyal@cornell.edu</a>></span> wrote:<br></div><div class=3D"gm= ail_extra"> <div class=3D"gmail_quote"><div class=3D"im"> <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div><span style=3D"color:r= gb(34,34,34)">The attack can be easily hidden. And be sure that before toda= y, today,=A0</span><br> </div><div class=3D"gmail_extra"><div class=3D"gmail_quote"><div>and after = today, very smart people are at their computer planning attacks=A0</div> <div>on Bitcoin. Exploits must be published and fixed FAST.=A0</div></div><= /div></div></blockquote><div><br></div></div><div>I think it would be helpf= ul if you actually implemented and pulled off this attack, by becoming the = dominant miner capable of reversing spends at will. Then we'd know how = quickly it can be done.</div> <div><br></div><div><br></div></div><br></div></div> <br>-----------------------------------------------------------------------= -------<br> November Webinars for C, C++, Fortran Developers<br> Accelerate application performance with scalable programming models. Explor= e<br> techniques for threading, error checking, porting, and tuning. Get the most= <br> from the latest Intel processors and coprocessors. See abstracts and regist= er<br> <a href=3D"http://pubads.g.doubleclick.net/gampad/clk?id=3D60136231&iu= =3D/4140/ostg.clktrk" target=3D"_blank">http://pubads.g.doubleclick.net/gam= pad/clk?id=3D60136231&iu=3D/4140/ostg.clktrk</a><br>___________________= ____________________________<br> Bitcoin-development mailing list<br> <a href=3D"mailto:Bitcoin-development@lists.sourceforge.net">Bitcoin-develo= pment@lists.sourceforge.net</a><br> <a href=3D"https://lists.sourceforge.net/lists/listinfo/bitcoin-development= " target=3D"_blank">https://lists.sourceforge.net/lists/listinfo/bitcoin-de= velopment</a><br> <br></blockquote></div><br></div> --047d7b5d8d4575f8fb04ea71e9da--