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From: Alex Mizrahi <alex.mizrahi@gmail.com>
Date: Fri, 7 Apr 2017 10:44:59 +0300
Message-ID: <CAE28kUQ4bRxJ9RCJhxyqRnDgdfnfDQ3ubk2ysQbWEVGscGtPtw@mail.gmail.com>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Content-Type: multipart/alternative; boundary=001a114a7d6a77ee3e054c8ecdf8
Subject: Re: [bitcoin-dev] BIP proposal: Inhibiting a covert attack on the
 Bitcoin POW function
Precedence: list

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> Can you please not forget to supply us more details on the claims made
> regarding the reverse engineering of the Asic chip?
>
> It is absolutely crucial that we get these independently verified ASAP.
>

Bitmain confirmed that their chips support ASICBOOST and it can be used for
mining:

https://blog.bitmain.com/en/regarding-recent-allegations-smear-campaigns/

They claim that they don't use it on mainnet, but that claim cannot be
verified. it is possible to do covert ASICBOOST in a 100% covert manner.
(It can be done without "transaction reordering" so it's not worth
analyzing blocks etc.)

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<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><div=
>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"=
ltr"><div><div class=3D"gmail-m_-553665882450504519gmail_signature"><div di=
r=3D"ltr"><div>Can you please not forget to supply us more details on the c=
laims made regarding the reverse engineering of the Asic chip?<br><br>It is=
 absolutely crucial that we get these independently verified ASAP.</div></d=
iv></div></div></div></blockquote><div><br></div><div>Bitmain confirmed tha=
t their chips support ASICBOOST and it can be used for mining:</div><div><b=
r></div><div><a href=3D"https://blog.bitmain.com/en/regarding-recent-allega=
tions-smear-campaigns/">https://blog.bitmain.com/en/regarding-recent-allega=
tions-smear-campaigns/</a><br></div><div><br></div><div>They claim that the=
y don&#39;t use it on mainnet, but that claim cannot be verified. it is pos=
sible to do covert ASICBOOST in a 100% covert manner. (It can be done witho=
ut &quot;transaction reordering&quot; so it&#39;s not worth analyzing block=
s etc.)</div></div></div></div>

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