From: Allen Piscitello <allen.piscitello@gmail•com>
To: Luke-Jr <luke@dashjr•org>
Cc: Bitcoin Development <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Message Signing based authentication
Date: Sat, 2 Nov 2013 20:19:51 -0500 [thread overview]
Message-ID: <CAJfRnm6eRRF1ZxRJ89enPNkaG3-BNyboP9DujmuBgQxNhdhU8g@mail.gmail.com> (raw)
In-Reply-To: <201311030033.56983.luke@dashjr.org>
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I actually had a use case in my case where it was possible, and that was
the check I used to get around it, just configured it so that I always
generated a new key when I needed to set up a 2 of 2 Multisig Refund Tx.
It was either that or making sure I had no unspent outputs. The use case
of doing it was laziness in just creating a single key.
On Sat, Nov 2, 2013 at 7:33 PM, Luke-Jr <luke@dashjr•org> wrote:
> On Sunday, November 03, 2013 12:29:28 AM Allen Piscitello wrote:
> > This was one of my concerns when implementing a scheme where you sign a
> > refund transaction before the original transaction is broadcast. I
> > originally tried to pass a hash and have the server sign it. However, I
> > had no way to know that what I was signing wasn't a transaction that was
> > spending my coins! So I changed the code to require sending the full
> > transaction, not just the hash. The other way to mitigate this is
> through
> > not having any unspent outputs from this key.
>
> Well, there's no use case to sign with an address that has already been
> sent
> coins. The main problem with enforcing this is that you can't exactly stop
> someone from sending to an "identity" address.
>
> Luke
>
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next prev parent reply other threads:[~2013-11-03 1:20 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-02 5:01 bitcoingrant
2013-11-02 5:54 ` Luke-Jr
2013-11-02 13:02 ` Mike Hearn
2013-11-02 13:16 ` Melvin Carvalho
2013-11-02 13:19 ` Hannu Kotipalo
2013-11-02 16:26 ` Mike Hearn
2013-11-02 16:26 ` Mike Hearn
2013-11-02 16:52 ` Melvin Carvalho
2013-11-02 17:08 ` Jeff Garzik
2013-11-02 17:16 ` Hannu Kotipalo
2013-11-02 21:14 ` Johnathan Corgan
2013-11-02 21:51 ` Mark Friedenbach
2013-11-03 0:29 ` Allen Piscitello
2013-11-03 0:33 ` Luke-Jr
2013-11-03 1:19 ` Allen Piscitello [this message]
2013-11-03 1:27 ` Luke-Jr
2013-11-03 1:36 ` Allen Piscitello
2013-11-03 6:23 ` Timo Hanke
2013-11-06 3:38 ` Melvin Carvalho
2013-11-02 21:57 ` slush
2013-11-06 3:01 ` Melvin Carvalho
2013-11-06 6:41 ` slush
2013-12-06 10:44 ` Melvin Carvalho
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