From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1XFonR-0001Ez-Kk for bitcoin-development@lists.sourceforge.net; Fri, 08 Aug 2014 18:21:45 +0000 Received-SPF: pass (sog-mx-4.v43.ch3.sourceforge.com: domain of bitpay.com designates 209.85.223.172 as permitted sender) client-ip=209.85.223.172; envelope-from=jgarzik@bitpay.com; helo=mail-ie0-f172.google.com; Received: from mail-ie0-f172.google.com ([209.85.223.172]) by sog-mx-4.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1XFonQ-0006hl-Ar for bitcoin-development@lists.sourceforge.net; Fri, 08 Aug 2014 18:21:45 +0000 Received: by mail-ie0-f172.google.com with SMTP id lx4so6919942iec.3 for ; Fri, 08 Aug 2014 11:21:39 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=PUVR7duUDOXUje/L0al7PXsAAJfLpseaOrV+fbBdBnM=; b=hXnp+yNutdGA6l5wXLXIw4VR1O6gUaKkite7TNZ2vVB04awLG0psmDgVUliKq0Eun6 7i9mmLx1ZizqcgwhErc/V/iUacnyRlVONCxIOKszl9xdtmho1wYI90rp6lYu6NPRxbE1 SIUUgRVv84s68oQgPofGkvSi23lcWm6FlTqnz4pAzcZ2qrdU919w2qv7Q+sHyuGBboFc FiOYc9Bqx55p9qiVp3toNyP8dXxDj+gEunfp6kOA2jGvP6W9Eeg6EsG0bvZsX5YjMrpf ixhjCc7rFnC1zJNSDFPRVHl3nr4MzC44KXt/uWuP3mo0VYAH7Mp0OA4tlI0uGkEVzSLB JMIg== X-Gm-Message-State: ALoCoQky8suqDD7GADueBqczqr+pFth+PvWdOGoTKAvKvZsfK1nTaW5+zAXiBPXWCvuolF2PX2AI X-Received: by 10.50.107.7 with SMTP id gy7mr7515442igb.15.1407522098984; Fri, 08 Aug 2014 11:21:38 -0700 (PDT) MIME-Version: 1.0 Received: by 10.107.10.78 with HTTP; Fri, 8 Aug 2014 11:21:18 -0700 (PDT) In-Reply-To: References: <201408072345.45363.luke@dashjr.org> <201408080101.16453.luke@dashjr.org> From: Jeff Garzik Date: Fri, 8 Aug 2014 14:21:18 -0400 Message-ID: To: Mike Hearn Content-Type: text/plain; charset=UTF-8 X-Spam-Score: -1.6 (-) 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 SPF_PASS SPF: sender matches SPF record -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: 1XFonQ-0006hl-Ar Cc: "bitcoin-development@lists.sourceforge.net" Subject: Re: [Bitcoin-development] Miners MiTM 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: Fri, 08 Aug 2014 18:21:45 -0000 gmaxwell noted on IRC that enabling TLS could be functionally, if not literally, a DoS on the pool servers. Hence the thought towards a more lightweight method that simply prevents client payout redirection + server impersonation. On Fri, Aug 8, 2014 at 5:53 AM, Mike Hearn wrote: >> Certificate validation isn't needed unless the attacker can do a direct >> MITM >> at connection time, which is a lot harder to maintain than injecting a >> client.reconnect. > > > Surely the TCP connection will be reset once the route reconfiguration is > completed, either by the MITM server or by the client TCP stack when it > discovers the server doesn't know about the connection anymore? > > TLS without cert validation defeats the point, you can still be connected to > a MITM at any point by anyone who can simply interrupt or corrupt the > stream, forcing a reconnect. > > ------------------------------------------------------------------------------ > Want fast and easy access to all the code in your enterprise? Index and > search up to 200,000 lines of code with a free copy of Black Duck > Code Sight - the same software that powers the world's largest code > search on Ohloh, the Black Duck Open Hub! Try it now. > http://p.sf.net/sfu/bds > _______________________________________________ > Bitcoin-development mailing list > Bitcoin-development@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/bitcoin-development > -- Jeff Garzik Bitcoin core developer and open source evangelist BitPay, Inc. https://bitpay.com/