From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1W5OBK-0002mq-G8 for bitcoin-development@lists.sourceforge.net; Mon, 20 Jan 2014 23:23:02 +0000 Received: from mail-yh0-f53.google.com ([209.85.213.53]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1W5OBJ-0005mn-7P for bitcoin-development@lists.sourceforge.net; Mon, 20 Jan 2014 23:23:02 +0000 Received: by mail-yh0-f53.google.com with SMTP id b20so2275820yha.12 for ; Mon, 20 Jan 2014 15:22:55 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:date:from:organization:user-agent :mime-version:to:subject:references:in-reply-to:content-type :content-transfer-encoding; bh=fjp8xqMM7jxiQw0LGjaSNdmyk134Ct/P+wuHYz+EaUM=; b=A4J+4DE+iiU4Gtocy1OBlzsr3ED1pin9a0dZxXUfVH/PMI5//k0KOSu0qCoFdg54CE ucl1Hzpjvneuzm7iSEDeVz7z6A79Tn0SRng4EGp6Br0jsw/Rfxn5ioVJPgxPHQy3qmO3 gsMv+YGZCoA8u+NSuvvxZQIbwtBPE40mw2ykiMvdTmZANlNX3eX7SrIlzzpJawPI+3XL MP1QWdJ/+MKoDVMWXjZ8jjeLw1NmsrF8LLB8PtD7K7TURAPJy1usxqmf0VbUQxzuAjP4 qg13gE6Bw5qUY/6K52TK1bmv+fHe/kaauuHgtRXmQ5US3WayTgpOLbgSbabvxuJfD/HM w2bg== X-Gm-Message-State: ALoCoQm8XXvyB4lrTEgfcWV/3MsDYaifsQP8fuEcK+6ufurUJ70gq7ZIKzH+r7zWm5hj88Is2shQ X-Received: by 10.236.228.137 with SMTP id f9mr20045825yhq.44.1390260175760; Mon, 20 Jan 2014 15:22:55 -0800 (PST) Received: from [192.168.127.165] (adsl-71-131-179-82.dsl.sntc01.pacbell.net. [71.131.179.82]) by mx.google.com with ESMTPSA id 9sm6883713yhe.21.2014.01.20.15.22.54 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 20 Jan 2014 15:22:54 -0800 (PST) Message-ID: <52DDAECC.9010107@monetize.io> Date: Mon, 20 Jan 2014 15:18:36 -0800 From: Mark Friedenbach Organization: Monetize.io Inc. User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: bitcoin-development@lists.sourceforge.net References: <20140120223502.GA1055@petertodd.org> <20140120231441.GA9332@netbook.cypherspace.org> In-Reply-To: <20140120231441.GA9332@netbook.cypherspace.org> X-Enigmail-Version: 1.6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Spam-Score: 0.0 (/) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. X-Headers-End: 1W5OBJ-0005mn-7P Subject: Re: [Bitcoin-development] BIP0039: Final call 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, 20 Jan 2014 23:23:02 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Proper Unicode handling is a serious issue however. You don't want someone to move from one input method / machine to another and suddenly find that their coins are inaccessible, because of an issue of decomposed vs. compatibility forms or whatever. On 01/20/2014 03:14 PM, Adam Back wrote: > Because the mnemonic is an encoding of a 128-bit random number > using its hash as a private key (or derived part of one) is not a > problem, its just an alternate alphabet encoding of the random > private key. > > Not being able to generically understand the checksum. Seems > tricky to solve other than say brute force eg H(mnemonic||1) mod > 2^k == 0 where k is the amount of check digit redundancy. But that > might be expensive for a trezor if k is very big at all. And then > key = H(mnemonic). > > Adam > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJS3a7MAAoJEAdzVfsmodw4/MAP/3Rk4sbQBv5aGqM2iAMBZkjq CxGNSrzxKKgAYf+aFka6FVrBZJRHU39mEon53H0DR92+3vA2BHns8YEKH18LneQ9 16qJAp4y+ml5jbdCI6TY1JCM4ObmXsZbsPF17lKdVPISkz8DhUMUNLHdOx8cZHkw Kj5RXuLBFwqFiCcAqYdoIpFmDpfaJfZ3k9OHzPRsto1oyOrXdwc+TK8YZHISWR3M nzsMcp2z9Uu8M/NeDo4gM0WFpIZ41W9JsYeMeJzdU6xd1HKdmC0CZCyc8EmAre58 XGc2gtc9PjXIwWW+FTkZ5pYJz718WBq4Wja1hir5eaTJZurs1fp+1iJ7jiDkloJH h/pWp8wcXVaAklaImota3PASr5qnP8zjzaKZALn/0gJEkIKnIJz3N32BLw7QsoEL k5VaMQ5x7/9zK+Qc5kWvtTjleRO23DnW+XVud0jbAHTM1wfTQH0dJIgEpe3HQZOR 9a09/ZKN8kC+2fj/u6EjkVh5RvwTv0iq+RvBDmsFjaVOfBzRL1LVKgKJvdG+0hix XyPtnBflC1uNLNg/yjBEP7/cKePJVMcDzVBwjpbnEOo9ZGO2ixSh8qMQ/nn6V96R hZZv8mVI1bGhWlvQEoMw5X7M4xyP25GboCv4wJrYT/8VQfe56BSKXS+AHfl+hIoa Jjmcqvm+sfk/0awxj4Ce =1crJ -----END PGP SIGNATURE-----