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 ) id 1YEhBK-0004Bk-1Z for bitcoin-development@lists.sourceforge.net; Fri, 23 Jan 2015 16:34:02 +0000 Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.216.177 as permitted sender) client-ip=209.85.216.177; envelope-from=etotheipi@gmail.com; helo=mail-qc0-f177.google.com; Received: from mail-qc0-f177.google.com ([209.85.216.177]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1YEhBJ-0002GE-6e for bitcoin-development@lists.sourceforge.net; Fri, 23 Jan 2015 16:34:01 +0000 Received: by mail-qc0-f177.google.com with SMTP id p6so7081362qcv.8 for ; Fri, 23 Jan 2015 08:33:55 -0800 (PST) X-Received: by 10.140.19.78 with SMTP id 72mr1257867qgg.48.1422030835301; Fri, 23 Jan 2015 08:33:55 -0800 (PST) Received: from [192.168.1.28] (c-69-143-204-74.hsd1.md.comcast.net. [69.143.204.74]) by mx.google.com with ESMTPSA id 11sm1858330qgt.41.2015.01.23.08.33.54 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 23 Jan 2015 08:33:54 -0800 (PST) Message-ID: <54C277F2.7010905@gmail.com> Date: Fri, 23 Jan 2015 11:33:54 -0500 From: Alan Reiner User-Agent: Mozilla/5.0 (X11; Linux i686 on x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 MIME-Version: 1.0 To: Gregory Maxwell References: <54C267A1.8090208@gmail.com> <54C2766F.6030200@gmail.com> In-Reply-To: <54C2766F.6030200@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Spam-Score: -1.3 (-) 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 (etotheipi[at]gmail.com) -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 0.3 AWL AWL: Adjusted score from AWL reputation of From: address X-Headers-End: 1YEhBJ-0002GE-6e Cc: Bitcoin Development Subject: Re: [Bitcoin-development] SIGHASH_WITHINPUTVALUE 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, 23 Jan 2015 16:34:02 -0000 On 01/23/2015 11:27 AM, Alan Reiner wrote: > > I am happy to entertain other ideas that achieve our goals here, but I'm > fairly confident that the new SIGHASH type is the only way that would > allow devices like Trezor to truly simplify their design (and still work > securely on 100% of funds contained by the wallet). > Self-correction ... I didn't mean it's the "only way", I mean it's by far the easiest, simplest, least-intrusive way that achieves the properties we need for this to be useful.