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| author | Peter Todd <pete@petertodd.org> | 2016-02-12 10:34:53 -0500 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2016-02-12 15:35:11 +0000 |
| commit | 82799bb179c44982c7548ed6956e92fb2be755a0 (patch) | |
| tree | 2e35e4dd971c2754574145efc6f300e08fdbf67a | |
| parent | 29db01c2cf6bb879712a257f7469d8a0112fdee9 (diff) | |
| download | pi-bitcoindev-82799bb179c44982c7548ed6956e92fb2be755a0.tar.gz pi-bitcoindev-82799bb179c44982c7548ed6956e92fb2be755a0.zip | |
Re: [bitcoin-dev] Soft fork fix for block withholding attacks
| -rw-r--r-- | 09/cacb0123ffa381d1b865756130536a891549c5 | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/09/cacb0123ffa381d1b865756130536a891549c5 b/09/cacb0123ffa381d1b865756130536a891549c5 new file mode 100644 index 000000000..641459c8e --- /dev/null +++ b/09/cacb0123ffa381d1b865756130536a891549c5 @@ -0,0 +1,128 @@ +Return-Path: <pete@petertodd.org> +Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org + [172.17.192.35]) + by mail.linuxfoundation.org (Postfix) with ESMTPS id 98FC3E0B + for <bitcoin-dev@lists.linuxfoundation.org>; + Fri, 12 Feb 2016 15:35:11 +0000 (UTC) +X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 +Received: from outmail148154.authsmtp.co.uk (outmail148154.authsmtp.co.uk + [62.13.148.154]) + by smtp1.linuxfoundation.org (Postfix) with ESMTP id BBAE890 + for <bitcoin-dev@lists.linuxfoundation.org>; + Fri, 12 Feb 2016 15:35:10 +0000 (UTC) +Received: from mail-c232.authsmtp.com (mail-c232.authsmtp.com [62.13.128.232]) + by punt21.authsmtp.com (8.14.2/8.14.2/) with ESMTP id u1CFZ88B070508; + Fri, 12 Feb 2016 15:35:08 GMT +Received: from petertodd.org (ec2-52-5-185-120.compute-1.amazonaws.com + [52.5.185.120]) (authenticated bits=0) + by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id u1CFZ25O095534 + (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); + Fri, 12 Feb 2016 15:35:03 GMT +Received: from [127.0.0.1] (localhost [127.0.0.1]) + by petertodd.org (Postfix) with ESMTPSA id 961C640012; + Fri, 12 Feb 2016 15:31:44 +0000 (UTC) +Received: by savin (Postfix, from userid 1000) + id 07D3913FC08; Fri, 12 Feb 2016 10:35:01 -0500 (EST) +Received: by savin (hashcash-sendmail, from uid 1000); + Fri, 12 Feb 2016 10:34:53 -0500 +Date: Fri, 12 Feb 2016 10:34:53 -0500 +From: Peter Todd <pete@petertodd.org> +To: gladoscc <admin+g@glados.cc> +Message-ID: <20160212153453.GA4976@savin.petertodd.org> +References: <CAL7-sS0NdZ4E7qwSs9TQdvsyqrzY0q847oM2cnwEYA3ciXCs4g@mail.gmail.com> + <CAL7-sS3QFGg_uj0UN+vPSE1Y3-XTj3HeCaPxERznpMfhvaj28A@mail.gmail.com> + <CAL7-sS2DqPF0Y7+UT7qGp==MJBmHmbQW5em+XFY8ZkVPuzCPcQ@mail.gmail.com> + <CAL7-sS2TMUg1KTPgitzMq61-4+ppzpZ7E_aEsbLXOuBYqU_q-g@mail.gmail.com> + <CAL7-sS1JhXAJ_hjUpLvnPWiwsf2hOwsaZdrq9negDPZiGs4nmg@mail.gmail.com> + <CAL7-sS2vb5Aid-pTHHgJ0N9O8QYP=OR3HE1bVGw32LPm6W9SUA@mail.gmail.com> +MIME-Version: 1.0 +Content-Type: multipart/signed; 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charset=us-ascii +Content-Disposition: inline +Content-Transfer-Encoding: quoted-printable + +On Fri, Feb 12, 2016 at 10:31:56PM +1100, gladoscc via bitcoin-dev wrote: +> Here's a method of fixing block withholding attacks with a soft fork: + +So, while you're technique I believe works, it's not a soft-fork, at +least under the definition most of the Bitcoin dev/research community +have been using. + +The reason is if it's adopted by a majority of hashing power, less than +a majority of hashing power can create a chain that appears to be the +most-work chain, from the perspective of non-adopting nodes. Those nodes +would then be following a weaker chain. + +A better term for what you're proposing might be a "pseudo-soft-fork", +given that you don't quite meet the requirements for a true soft-fork. +Having said that, it may be the case that overall your technique still +reduces risk compared to a simpler hard-fork implementation of the idea; +more analysis is needed there. + +--=20 +https://petertodd.org 'peter'[:-1]@petertodd.org +000000000000000006d243cee301d792809a7d4d00c13ac24b43d5e9548625e4 + +--CE+1k2dSO48ffgeK +Content-Type: application/pgp-signature; name="signature.asc" +Content-Description: Digital signature + +-----BEGIN PGP SIGNATURE----- + +iQGrBAEBCACVBQJWvfuZXhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw +MDAwMDAwMDAwMDAwMDAwNmQyNDNjZWUzMDFkNzkyODA5YTdkNGQwMGMxM2FjMjRi +NDNkNWU5NTQ4NjI1ZTQvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 +ZUBwZXRlcnRvZC5vcmcACgkQJIFAPaXwkfu0zAf/VFd40EtGxhDJlWv5i8s4zEz7 +9CtjCWMqflJnpegNniPig05nTFDrGxhU/f3C8/mDk05Ooh/22AT3B3Q+F/iUlE/v +Y6M/Kh+GJ9mdPT65JTLeX1loCExR9355bRQtW+ObENnTbMDg3O/EdTPfKO44NskN +AXp9cUZV/2s68fFI6rMuvx7XMWaEgMWnoXMvpISP2ms4Z46i72VaDUJFcOnNK0ty +fETnLdW6DB9QYNwNVc5Jocb1FkHTX86zCg0pbOIkVAKm5jybFo0CJbqD8+HROldB +V4bW5aE9hgI6vlEiu2K9H0Am2Ko5E8tB7/0E5h8uZflOBmmhKERnQQvcNEZLoQ== +=OY79 +-----END PGP SIGNATURE----- + +--CE+1k2dSO48ffgeK-- + |