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From: Eric Lombrozo <elombrozo@gmail.com>
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Cc: bitcoin-development@lists.sourceforge.net
Subject: Re: [Bitcoin-development] F2Pool has enabled full replace-by-fee
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> On Jun 19, 2015, at 8:48 PM, Luke Dashjr <luke@dashjr.org> wrote:
>=20
> On Saturday, June 20, 2015 1:23:03 AM Aaron Voisine wrote:
>> They don't need to be made cryptographically safe, they just have to =
be
>> safer than, for instance, credit card payments that can be charged =
back. As
>> long as it's reasonably good in practice, that's fine.
>=20
> They never will be. You can get a decent rate of success merely by =
making one
> transaction propagate fast (eg, 1 input, 1 output) and the other slow =
(eg,
> 1000 inputs, 1000 outputs) and choosing your peers carefully. The only =
reason
> unconfirmed transactions aren't double spent today is because nobody =
is
> seriously *trying*.
>=20
> Luke
>=20
Newspapers are often sold in vending machines that make it possible for =
anyone to just pay the price of one and take them all=E2=80=A6and most =
of the time they are not that carefully monitored. Why? Because most =
people have better things to do than try to steal a few newspapers. They =
probably were much more closely monitored earlier in their history=E2=80=A6=
but once it became clear that despite the obvious attack vector very few =
people actually try to game it, vendors figured it wasn=E2=80=99t really =
that big a risk. Same thing applies to people trying to steal a piece of =
bubble gum at the cash register at a convenience store by =
double-spending.
- Eric Lombrozo
> =
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