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 <gmaxwell@gmail.com>) id 1QdqEb-0004U6-D2 for bitcoin-development@lists.sourceforge.net; Mon, 04 Jul 2011 20:59:13 +0000 Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.216.175 as permitted sender) client-ip=209.85.216.175; envelope-from=gmaxwell@gmail.com; helo=mail-qy0-f175.google.com; Received: from mail-qy0-f175.google.com ([209.85.216.175]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1QdqEa-0004oD-Pi for bitcoin-development@lists.sourceforge.net; Mon, 04 Jul 2011 20:59:13 +0000 Received: by qyk30 with SMTP id 30so1250930qyk.13 for <bitcoin-development@lists.sourceforge.net>; Mon, 04 Jul 2011 13:59:07 -0700 (PDT) MIME-Version: 1.0 Received: by 10.229.131.66 with SMTP id w2mr4731213qcs.254.1309813147201; Mon, 04 Jul 2011 13:59:07 -0700 (PDT) Received: by 10.229.83.196 with HTTP; Mon, 4 Jul 2011 13:59:07 -0700 (PDT) In-Reply-To: <CABsx9T31ZuQHKwcNnb9-NpaCA6c43PXVZ+Tc+GZ=2Wkz08enHw@mail.gmail.com> References: <1309801974.3423.80.camel@Desktop666> <CABsx9T31ZuQHKwcNnb9-NpaCA6c43PXVZ+Tc+GZ=2Wkz08enHw@mail.gmail.com> Date: Mon, 4 Jul 2011 16:59:07 -0400 Message-ID: <CAAS2fgRQApH+ObyXpwV0bCEv7q7BNs6HtzcBOo6+mixCwY93cw@mail.gmail.com> From: Gregory Maxwell <gmaxwell@gmail.com> To: Gavin Andresen <gavinandresen@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable 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: 1QdqEa-0004oD-Pi Cc: bitcoin-development@lists.sourceforge.net Subject: Re: [Bitcoin-development] Encrypted Wallet Backward Compatibility 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: Mon, 04 Jul 2011 20:59:13 -0000 On Mon, Jul 4, 2011 at 2:23 PM, Gavin Andresen <gavinandresen@gmail.com> wr= ote: > 0.4 and later could, on wallet encryption, create a wallet_e.dat > (encrypted wallet). =C2=A0Then truncate wallet.dat and set its > file-permissions to 000, so if old versions of bitcoin OR any dumb > wallet backup scripts try to read it they fail. [snip] Rewriting the old one before erasing it and replacing it with a placeholder might increase the chances that the old unencrypted keying material was not left on disk.