From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 52FB3C0177 for ; Mon, 6 Apr 2020 21:45:51 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 424CF87FC3 for ; Mon, 6 Apr 2020 21:45:51 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rq1-milgEhYa for ; Mon, 6 Apr 2020 21:45:50 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail-vs1-f68.google.com (mail-vs1-f68.google.com [209.85.217.68]) by whitealder.osuosl.org (Postfix) with ESMTPS id 7A2DE87F67 for ; Mon, 6 Apr 2020 21:45:50 +0000 (UTC) Received: by mail-vs1-f68.google.com with SMTP id e138so864391vsc.11 for ; Mon, 06 Apr 2020 14:45:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lifewithalacrity-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=o0jOcq94TIchZHBjFt3oYhByU7VWm9lQWCcXIZS81U8=; b=xhTKRkG+TBWjDfGAazDJNHrAKr6o9ilzHxWpRYfTaOdVKsL88v754Pk7CQwD5qVSI7 ResCNULMMJG+GuLK3ClqbqLowyIROhMPouMSurdYkiqFA1dUBhwtZK3RXTfQN+7Q7M8P Y+Pbn312xxI9OUiLcKO7W6U8qbmCApWJ3wuc3/TshHeUjKYThHLAhGF4q+ezIdqt71Vx OY1IQAB2WW+5ST/vzZsgIzGTN5VgWq04FDVY9MO/EULpY3Tx7wjQ8DGAWYftOrcFgiuw aIbDGwdNtAHFwI2qZUfhOMCjIHYFJomTCR7Yx7gSaauYM7+10SGkg1y2GAPpB98yC1ll YqHA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=o0jOcq94TIchZHBjFt3oYhByU7VWm9lQWCcXIZS81U8=; b=XHHVxC0L4WcDe6wdMvCgF7oGKPgiw/kfhG00yh64HzID+VTYgxeXECaTJILFthkiR1 J4a/khznZCRJzoXKk6OAnbuAdwfTrzKJFYefBcWp5IQfMeMBItqTkk2+4SywYVWeOQQN O3Uue18i3E7C1TbW6byGhTRIEA02DKGCDniHN/XZSCe4ht7K+BqV8rXFaBTd3dfL3yYQ uqBeCsdc7PW5l+2l/d1lSUcnds8UNRBX/SaFf3ueC6w/xT1/p5VVhrTHL+OBpZw/+AoU yxnCc0dogwsVDYeDNcP2L39wvLNeC+e9Qv1wba6ui9qxWuGoI+OL8PZldPkoGS2iZFcU yyqQ== X-Gm-Message-State: AGi0PuazQsk5HpUfdWpQuw8FQLc2OrQFwKiUrdfb/E0fjE/vYo2i/1Mh Wfa3Ad9KGPzI1rZxUskDaa293rtY3I1xcTDyr7g= X-Google-Smtp-Source: APiQypKOH0sWLOZM2H+415v3A1SG0/285N2GZzs6/BL/2utQXISuzNBz/cu24jRP2biZDCxiFjWYUCtINamGfjp6aHc= X-Received: by 2002:a67:2f97:: with SMTP id v145mr1564353vsv.63.1586209549266; Mon, 06 Apr 2020 14:45:49 -0700 (PDT) MIME-Version: 1.0 References: <20200406173617.GI3523@coinkite.com> In-Reply-To: From: Christopher Allen Date: Mon, 6 Apr 2020 14:45:37 -0700 Message-ID: To: Adam Back , Bitcoin Protocol Discussion , adam@cypherspace.org Content-Type: multipart/alternative; boundary="000000000000b9349c05a2a630f7" X-Mailman-Approved-At: Mon, 06 Apr 2020 22:07:58 +0000 Cc: "Peter D. Gray" Subject: Re: [bitcoin-dev] Deterministic Entropy From BIP32 Keychains X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Bitcoin Protocol Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Apr 2020 21:45:51 -0000 --000000000000b9349c05a2a630f7 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Although I believe that there needs to be a review by a cryptographic engineering expert (ideally Pieter Wuille, who may have to hold his nose to give it a pragmatic review) and I believe such a review will likely some suggest some improvements, I do think something in this area should be done= . For instance with the offline tool #LetheKit https://github.com/BlockchainCommons/bc-lethe-kit, you could go to your vault, input your BIP39 from an offline titanium key or SLIP39 Shamir shards, and then derive a child key in BIP39 form that can be delivered via QR from the air-gapped LetheKit to another device you take away. =E2=80=94 Christopher Allen --000000000000b9349c05a2a630f7 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Although I believe that there needs to be a review b= y a cryptographic engineering expert (ideally Pieter Wuille, who may have t= o hold his nose to give it a pragmatic review) and I believe such a review = will likely some suggest some improvements, I do think something in this ar= ea should be done.

For instance with the offline tool #LetheKit https://github.com/BlockchainCommons/bc-le= the-kit, you could go to your vault, input your BIP39 from an offline t= itanium key or SLIP39 Shamir shards, and then derive a child key in BIP39 f= orm that can be delivered via QR from the air-gapped LetheKit to another de= vice you take away.

=E2= =80=94 Christopher Allen=C2=A0
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