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From: Erik Aronesty <erik@q32.com>
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Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Malice Reactive Proof of Work Additions (MR
POWA): Protecting Bitcoin from malicious miners
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--001a114072baf9ea3a054d580177
Content-Type: text/plain; charset=UTF-8
On Apr 16, 2017 6:28 PM, <bfd@cock.lu> wrote:
On 2017-04-16 17:04, Erik Aronesty via bitcoin-dev wrote:
> This is a great solution.
>
> 8 or more secure hashes, each of which can be implemented on GPU/CPU,
> but rotate through them - per block round robin.
>
> Hardware, infrastructue investment is protected. ASIC is not.
>
>
The write time for configuring a FPGA with a fresh bitstream is measured in
tens of milliseconds.
I have no objections to the use of FPGA or any other commercially available
hardware.
ASIC will never beat this - because it will be 8x more expensive to
> maintain the cold circuits.
>
>
Unused circuits don't consume power, which is the main cost in running a
miner
They make GPUs or FPGAs (as u mentioned) far more affordable. The problem
is centralized manufacturing, which, in turn, is a side effect of a covert
hardware mining optimization leading to a monopoly.
A rotating POW seems to make ASIC manufacture impractical compared to
generalized, commercially available hardware.
It's too bad we can't make the POW somehow dynamic so that any specialized
hardware is impossible, and only GPU / FPGA is possible.
--001a114072baf9ea3a054d580177
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
<div dir=3D"auto"><div><br><div class=3D"gmail_extra"><br><div class=3D"gma=
il_quote">On Apr 16, 2017 6:28 PM, <<a href=3D"mailto:bfd@cock.lu">bfd@=
cock.lu</a>> wrote:<br type=3D"attribution"><blockquote class=3D"quote" =
style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><di=
v class=3D"quoted-text"><br>
<br>
On 2017-04-16 17:04, Erik Aronesty via bitcoin-dev wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
This is a great solution.<br>
<br>
8 or more secure hashes, each of which can be implemented on GPU/CPU,<br>
but rotate through them - per block round robin.<br>
<br>
Hardware, infrastructue investment is protected.=C2=A0 ASIC is not.<br>
<br>
</blockquote>
<br></div>
The write time for configuring a FPGA with a fresh bitstream is measured in=
tens of milliseconds.<div class=3D"quoted-text"></div></blockquote></div><=
/div></div><div dir=3D"auto"><br></div><div dir=3D"auto">I have no objectio=
ns to the use of FPGA or any other commercially available hardware.</div><d=
iv dir=3D"auto"><br></div><div dir=3D"auto"><div class=3D"gmail_extra"><div=
class=3D"gmail_quote"><blockquote class=3D"quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"quoted-text">=
<br>
<br>
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
ASIC will never beat this - because it will be 8x more expensive to<br>
maintain the cold circuits.<br>
<br>
</blockquote>
<br></div>
Unused circuits don't consume power, which is the main cost in running =
a miner<br></blockquote></div></div></div><div dir=3D"auto"><br></div><div =
dir=3D"auto">They make GPUs or FPGAs (as u mentioned) far more affordable.=
=C2=A0 The problem is centralized manufacturing, which, in turn, is a side =
effect of a covert hardware mining optimization leading to a monopoly.</div=
><div dir=3D"auto"><br></div><div dir=3D"auto">A rotating POW seems to make=
ASIC manufacture impractical compared to generalized, commercially availab=
le hardware.</div><div dir=3D"auto"><br></div><div dir=3D"auto">It's to=
o bad we can't make the POW somehow dynamic so that any specialized har=
dware is impossible, and only GPU / FPGA is possible.</div><div dir=3D"auto=
"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><blockquote class=
=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-le=
ft:1ex"></blockquote></div><br></div></div></div>
--001a114072baf9ea3a054d580177--
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