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From: Nicolas Bacca <nicolas@ledger.fr>
Date: Wed, 17 Aug 2016 09:27:03 +0200
Message-ID: <CALGb227zi6FUtjkGAScqttk9xfz_p+D6Tx7q30aCJP5rNgPvkg@mail.gmail.com>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
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Subject: Re: [bitcoin-dev] Hardware Wallet Standard
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On Wed, Aug 17, 2016 at 2:14 AM, Peter Todd via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

>
> I'm not aware of any ECC-enabled smart-cards that can sign the specific
> curve
> that Bitcoin uses, not to mention the fact that those smartcards generally
> only
> speak higher level protocols than raw signature generation, precluding the
> signing of bitcoin transactions.
>

any Java Card supporting ECC can sign on user supplied Weierstrass curve
parameters - you can find a good shopping list at
http://www.fi.muni.cz/~xsvenda/jcsupport.html (look for ALG_ECDSA_SHA256 on
javacard.crypto.signature). The NXP JCOP platform (found in Yubico Neo) is
a popular choice, and then you can add your own custom logic for validation.

-- 
Nicolas Bacca | CTO, Ledger

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><div class=3D"gmail_quote">=
On Wed, Aug 17, 2016 at 2:14 AM, Peter Todd via bitcoin-dev <span dir=3D"lt=
r">&lt;<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=3D"_=
blank">bitcoin-dev@lists.linuxfoundation.org</a>&gt;</span> wrote:<br><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex"><span class=3D""><br>
</span>I&#39;m not aware of any ECC-enabled smart-cards that can sign the s=
pecific curve<br>
that Bitcoin uses, not to mention the fact that those smartcards generally =
only<br>
speak higher level protocols than raw signature generation, precluding the<=
br>
signing of bitcoin transactions.<br></blockquote><div><br></div><div>any Ja=
va Card supporting ECC can sign on user supplied Weierstrass curve paramete=
rs - you can find a good shopping list at=C2=A0<a href=3D"http://www.fi.mun=
i.cz/~xsvenda/jcsupport.html">http://www.fi.muni.cz/~xsvenda/jcsupport.html=
</a> (look for ALG_ECDSA_SHA256 on javacard.crypto.signature). The NXP JCOP=
 platform (found in Yubico Neo) is a popular choice, and then you can add y=
our own custom logic for validation.</div><div>=C2=A0</div></div>-- <br><di=
v class=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"=
ltr"><div dir=3D"ltr">Nicolas Bacca | CTO, Ledger<div><br></div><div><br></=
div><div><br></div></div></div></div>
</div></div>

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