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From: Devrandom <c1.bitcoin@niftybox.net>
Date: Mon, 4 Feb 2019 17:37:16 -0800
Message-ID: <CAB0O3SUG5QbbdYphEkyRrbGfeeVF2L1UFKrg_wM+cxz5qdSdkg@mail.gmail.com>
To: James MacWhyte <macwhyte@gmail.com>, 
	Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Content-Type: multipart/alternative; boundary="00000000000009269205811ba7f1"
Subject: Re: [bitcoin-dev] Card Shuffle To Bitcoin Seed
Precedence: list

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I would suggest 50+ 6-sided dice rolls, giving about 128 bits of entropy.
Compared to a shuffle, it's easier to be sure that you got the right amount
of entropy, even if the dice are somewhat biased.


On Mon, Feb 4, 2019 at 2:33 PM James MacWhyte via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

>
> James
>
>
> On Sun, Feb 3, 2019 at 10:27 AM Ryan Havar via bitcoin-dev <
> bitcoin-dev@lists.linuxfoundation.org> wrote:
>
>> Conveniently a shuffled deck of cards also can serve as a physical backup
>> which is easy to hide in plain sight with great plausible deniability.
>>
>
> To make sure someone doesn't play with your cards and mix up the order,
> use a permanent marker to draw a diagonal line on the side of the deck from
> corner to corner. If the cards ever get mixed up, you can put them back in
> order by making sure the diagonal line matches up.
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>

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<div dir=3D"ltr">I would suggest 50+ 6-sided dice rolls, giving about 128 b=
its of entropy.=C2=A0 Compared to a shuffle, it&#39;s easier to be sure tha=
t you got the right amount of entropy, even if the dice are somewhat biased=
.<div><br></div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Mon, Feb 4, 2019 at 2:33 PM James MacWhyte via bitcoin-d=
ev &lt;<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org">bitcoin-dev=
@lists.linuxfoundation.org</a>&gt; wrote:<br></div><blockquote class=3D"gma=
il_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,2=
04,204);padding-left:1ex"><div dir=3D"ltr"><div dir=3D"ltr"><br clear=3D"al=
l"><div><div dir=3D"ltr" class=3D"gmail-m_5907409456106827790gmail_signatur=
e"><div dir=3D"ltr"><div>James<br></div></div></div></div><br></div><br><di=
v class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Feb 3=
, 2019 at 10:27 AM Ryan Havar via bitcoin-dev &lt;<a href=3D"mailto:bitcoin=
-dev@lists.linuxfoundation.org" target=3D"_blank">bitcoin-dev@lists.linuxfo=
undation.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex"><div>Conveniently a shuffled deck of cards also can serve as a =
physical backup which is easy to hide in plain sight with great plausible d=
eniability.</div></blockquote><div><br></div><div>To make sure someone does=
n&#39;t play with your cards and mix up the order, use a permanent marker t=
o draw a diagonal line on the side of the deck from corner to corner. If th=
e cards ever get mixed up, you can put them back in order by making sure th=
e diagonal line matches up.=C2=A0</div></div></div>
_______________________________________________<br>
bitcoin-dev mailing list<br>
<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=3D"_blank">=
bitcoin-dev@lists.linuxfoundation.org</a><br>
<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" =
rel=3D"noreferrer" target=3D"_blank">https://lists.linuxfoundation.org/mail=
man/listinfo/bitcoin-dev</a><br>
</blockquote></div>

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