Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1UKEfW-00077G-Hx for bitcoin-development@lists.sourceforge.net; Mon, 25 Mar 2013 21:11:02 +0000 Received-SPF: pass (sog-mx-3.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.215.50 as permitted sender) client-ip=209.85.215.50; envelope-from=gmaxwell@gmail.com; helo=mail-la0-f50.google.com; Received: from mail-la0-f50.google.com ([209.85.215.50]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1UKEfU-00070Z-Nq for bitcoin-development@lists.sourceforge.net; Mon, 25 Mar 2013 21:11:02 +0000 Received: by mail-la0-f50.google.com with SMTP id ec20so12308884lab.37 for ; Mon, 25 Mar 2013 14:10:54 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.112.199.2 with SMTP id jg2mr3350173lbc.13.1364245853938; Mon, 25 Mar 2013 14:10:53 -0700 (PDT) Received: by 10.112.96.164 with HTTP; Mon, 25 Mar 2013 14:10:53 -0700 (PDT) In-Reply-To: <20130325204911.GD65880@giles.gnomon.org.uk> References: <20130222230851.GO2030@giles.gnomon.org.uk> <20130225172353.GA7782@malakian.dd-wrt> <20130325204911.GD65880@giles.gnomon.org.uk> Date: Mon, 25 Mar 2013 14:10:53 -0700 Message-ID: From: Gregory Maxwell To: Roy Badami 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 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (gmaxwell[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 X-Headers-End: 1UKEfU-00070Z-Nq Cc: bitcoin-development@lists.sourceforge.net, Andrew Poelstra Subject: Re: [Bitcoin-development] Key retirement and key compromise 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: Mon, 25 Mar 2013 21:11:02 -0000 On Mon, Mar 25, 2013 at 1:49 PM, Roy Badami wrote: > I'm not envisaging something as drastic as changing the rules to make > transactions to revoked addresses invalid - just an overlay protocol. > Although to be useful such a protocol would have to be pretty much > universally implemented by clients. That is quite drastic enough, as it requires adding more perpetual data that must remain in fast lookup for all validating nodes (the set of revoked 'addresses'). Keep in mind that this is only improvement for what is a usually inadvisable usage of Bitcoin to begin with... you should not be reusing addresses.