diff options
| author | Gregory Maxwell <greg@xiph.org> | 2016-02-26 23:45:03 +0000 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2016-02-26 23:45:05 +0000 |
| commit | c41a8ac9eb6e1333bcc236a87445a0e893beffcd (patch) | |
| tree | 136c43083853727a320efe58753cdc327dc70f4f | |
| parent | ddee651aa61f9dac579106e0f7fa3d16112a5f4a (diff) | |
| download | pi-bitcoindev-c41a8ac9eb6e1333bcc236a87445a0e893beffcd.tar.gz pi-bitcoindev-c41a8ac9eb6e1333bcc236a87445a0e893beffcd.zip | |
Re: [bitcoin-dev] The first successful Zero-Knowledge Contingent Payment
| -rw-r--r-- | 45/3e26abc091200c868f3f8b7c7ad5a3b14e2f66 | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/45/3e26abc091200c868f3f8b7c7ad5a3b14e2f66 b/45/3e26abc091200c868f3f8b7c7ad5a3b14e2f66 new file mode 100644 index 000000000..583e4fb83 --- /dev/null +++ b/45/3e26abc091200c868f3f8b7c7ad5a3b14e2f66 @@ -0,0 +1,96 @@ +Return-Path: <gmaxwell@gmail.com> +Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org + [172.17.192.35]) + by mail.linuxfoundation.org (Postfix) with ESMTPS id 71BD9DF2 + for <bitcoin-dev@lists.linuxfoundation.org>; + Fri, 26 Feb 2016 23:45:05 +0000 (UTC) +X-Greylist: whitelisted by SQLgrey-1.7.6 +Received: from mail-io0-f174.google.com (mail-io0-f174.google.com + [209.85.223.174]) + by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 49D4614D + for <bitcoin-dev@lists.linuxfoundation.org>; + Fri, 26 Feb 2016 23:45:04 +0000 (UTC) +Received: by mail-io0-f174.google.com with SMTP id z135so138604106iof.0 + for <bitcoin-dev@lists.linuxfoundation.org>; + Fri, 26 Feb 2016 15:45:04 -0800 (PST) +DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; + h=mime-version:sender:in-reply-to:references:date:message-id:subject + :from:to:cc; bh=1zz0sorjhIrDSW9HjOzbTeTvqEyXYaY+cb6HxwXjcOU=; + b=s+HzYKnW9ePk7d/IkBITdKp5RBDHYZh7RoUAVJvswoDcwrtMiuZJ/sAdqAh3tg/+vi + Sxn2KBOfBp3SyN2b4/ZnOO3xwGKJNvUegbaUOhXmE16EvZATMG/yWxvInFeK/6lWEl1p + RAj6RnwDvh+7rl3OlfhO+qPoTS1eFI0Ky7OgqAUpQSAnDC+HDT3GgW5jifjxsR0fSP0h + QkgvV+8JtIj7tMQgaa7cY+HkbKNmiiTyRHhc622RIm0tIAiTTQPgVah8nRCBvamc00hm + OIKHHIgxEvuWaVjY+V54xIdUOM7gtUAXw4tHL8wq/fdyUQrnZMkwia37iEfKYhH6cXpP + uwlA== +X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; + d=1e100.net; s=20130820; + h=x-gm-message-state:mime-version:sender:in-reply-to:references:date + :message-id:subject:from:to:cc; + bh=1zz0sorjhIrDSW9HjOzbTeTvqEyXYaY+cb6HxwXjcOU=; + b=F8xHizJeQvQdsGgPV9+VeVsq6w3zvzAoh5yyYDMjkR4NnFnK+ttPiGo4GzN9vbZUpP + Ii+k2Sv17iOO27c5sWnh5Y/9IJmg0EYBrUiJ/VuX932Z5XpUNW/VoOocGPmrV8CQ/WAF + pUFqZWZ4sWkfTSSEt9Ptg7yH8EBWQZJYF2zMT0anVdb7/VkmElmTxJD/N0coXjW0+Zgm + 8U6deO6JG6kcR0HI2lPb2qz5T51xEZgWPEIzJ43iJ2A28JubJWn4C7Eb9pjVa9HmrrtH + m0WmtnQ5aaaYdlYnQCjGomWe+yUYMDb487RjkuJpkYrXgzX56nzXxMXX4WCoQcBMWCrc + 8o8w== +X-Gm-Message-State: AG10YOT6NXAzAF0KThUYc7y5H2C8WQPdEILED/eG7zQHDTN/4ofr9YsVXDh76+vaaMq84zzG5OFEBa1yED7TIg== +MIME-Version: 1.0 +X-Received: by 10.107.4.213 with SMTP id 204mr10589307ioe.134.1456530303708; + Fri, 26 Feb 2016 15:45:03 -0800 (PST) +Sender: gmaxwell@gmail.com +Received: by 10.107.132.75 with HTTP; Fri, 26 Feb 2016 15:45:03 -0800 (PST) +In-Reply-To: <CAE-z3OVpd99Xyd9xenJir=7qfr4KOx=_hDpKtEKzAqtzteNMyQ@mail.gmail.com> +References: <CAAS2fgRtxpg55XaM2qpgevtfdhvtnakdKhY2WgpGXgsZqVm=Gg@mail.gmail.com> + <CAKzdR-rp0Bqkj3PLWHx4etHejy2C997M3fGJy702jPdVThxPZg@mail.gmail.com> + <CAE-z3OVpd99Xyd9xenJir=7qfr4KOx=_hDpKtEKzAqtzteNMyQ@mail.gmail.com> +Date: Fri, 26 Feb 2016 23:45:03 +0000 +X-Google-Sender-Auth: g7g5xzTvy-1kxu7KvNo_Uz52s1I +Message-ID: <CAAS2fgRTMoeC2sa-Hzr44amqZ16tyNUcLXxbN0W4tSfzr7Z0pw@mail.gmail.com> +From: Gregory Maxwell <greg@xiph.org> +To: Tier Nolan <tier.nolan@gmail.com> +Content-Type: text/plain; charset=UTF-8 +X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIM_SIGNED, + DKIM_VALID, FREEMAIL_FROM, RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 +X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on + smtp1.linux-foundation.org +Cc: Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org> +Subject: Re: [bitcoin-dev] The first successful Zero-Knowledge Contingent + Payment +X-BeenThere: bitcoin-dev@lists.linuxfoundation.org +X-Mailman-Version: 2.1.12 +Precedence: list +List-Id: Bitcoin Development Discussion <bitcoin-dev.lists.linuxfoundation.org> +List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe> +List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/> +List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org> +List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help> +List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe> +X-List-Received-Date: Fri, 26 Feb 2016 23:45:05 -0000 + +On Fri, Feb 26, 2016 at 11:33 PM, Tier Nolan via bitcoin-dev +<bitcoin-dev@lists.linuxfoundation.org> wrote: +> That is very interesting. +> +> There has been some recent discussion about atomic cross chain transfers +> between Bitcoin and legacy altcoins. For this purpose a legacy altcoin is +> one that has strict IsStandard() rules and none of the advanced script +> opcodes. + +One might wonder why anyone would want to own coins that couldn't keep +up technologically, but to each his own. (especially one defunct +enough that it can't even update IsStandard rules...) + +I don't think it's infeasible to do the EC multiply in a snark, but an +efficient implementation would be a lot of work. You'd probably want +to build a circuit for the field operations using 128 bit operations. +Fortunately the overall operation is pretty easy to directly convert +into a circuit (e.g. no branching). + +Why not use the single-show-signature scheme I came up with a while +back on the Bitcoin side to force the bitcoin side to reveal a private +key? + +http://lists.linuxfoundation.org/pipermail/lightning-dev/2015-November/000344.html + |