Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 19548D8D for ; Mon, 5 Feb 2018 15:56:57 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-lf0-f50.google.com (mail-lf0-f50.google.com [209.85.215.50]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 49B172F6 for ; Mon, 5 Feb 2018 15:56:56 +0000 (UTC) Received: by mail-lf0-f50.google.com with SMTP id w27so42431087lfd.6 for ; Mon, 05 Feb 2018 07:56:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rgrant-org.20150623.gappssmtp.com; s=20150623; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to; bh=bwfRdYjaANlofpWIKfmEE3KBmksw9+TT0AEBavnPhY0=; b=Yz22F9pZs34WqhNPLqeQMvvtxD3oYtzsknpSgJRiUpmuVKvXLlLs6W1Z9koi4M5sWI MiJXZK6nzwSJpeKnhA33O6zNTvHExozllN9tw0qqStHS3MWgIcuf+1l0ACqOHK3nu350 pnb6kcjUub79KS5ZcKB7u0lcEFRdIOUVQ7YKLJq5XC6+u3RYQgUskArhZrwHbplfEPRo ze1U33TlttllEQvMYJMIMjWeLQuz9h8/qes83q9P2HQTZ/efW+QwNi+2zr923C66NK+v mwKvnar8BLVGZAi6/MGrq9l7ofCLtsJjTxe27SWBX1Bb8oWLwxV0jJOjHTxwZ6MsrTSi 0NtQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to; bh=bwfRdYjaANlofpWIKfmEE3KBmksw9+TT0AEBavnPhY0=; b=s8AcCAoChJGizEMm6HAABLLxVGECXGm/2tIUkmn7M8ohj+YLHCUt03rTEIrEWHj+Bp Xt3QTwLE16bzoDwloy98TnyN2cGLyPzhQzVdlBIimaWlufYN1G6JhiI+95WeSYH0gQ+J 1tjQjyzIhzodxSUuofJh6e1QwLJRjuQSEbuf6HXwGq8ReNDPqievOiV3lRjX3UtlktM4 at+/zr7mwwxZfTsw4vIcwB4pjsGmM06Ky1U7xxxm75pKfEHZv0hp5LT2dT2CFmC0GbvN TRc4nYWZG40Sfxe0HVZ2ASVMa2zLPNJTuvDAft79bqegddiyscFerja0mSboSztvS2se p2dg== X-Gm-Message-State: AKwxytfw7Ym4VIkRXf4nKF0i/nATJkd8LTW8SlVs+AhPlSzfgKGRwG9C XoRgiZR+CHN2WhIehZCeY6lSHBhwy2KWA+OQsp5qrblyeRg= X-Google-Smtp-Source: AH8x224Q4uGG1J7uRPWemkPoPamh+70WLKFFelUbfYx75R7Fx757zUOyFUjY5404A2+KPdxFPzHPJi05Su0Z8IdC0IA= X-Received: by 10.25.228.13 with SMTP id b13mr31258074lfh.61.1517846214631; Mon, 05 Feb 2018 07:56:54 -0800 (PST) MIME-Version: 1.0 Sender: rgrant@rgrant.org Received: by 10.25.79.80 with HTTP; Mon, 5 Feb 2018 07:56:23 -0800 (PST) In-Reply-To: References: From: Ryan Grant Date: Mon, 5 Feb 2018 10:56:23 -0500 X-Google-Sender-Auth: _ZARRPfCayak3u2oGTbo9hwbsW0 Message-ID: To: Gregory Maxwell , Bitcoin Protocol Discussion Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Subject: Re: [bitcoin-dev] Graftroot: Private and efficient surrogate scripts under the taproot assumption X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Protocol Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Feb 2018 15:56:57 -0000 Am I reading correctly that this allows unilateral key rotation (to a previously unknown key), without invalidating the interests of other parties in the existing multisig (or even requiring any on-chain transaction), at the cost of storing the signed delegation?