[Bitcoin-development] Duplicate transactions vulnerability

Amir Taaki zgenjix at yahoo.com
Wed Feb 29 17:02:29 UTC 2012

I support BIP 30.

I gave it a thought. The other ways of resolving this issue, all have various niggles. This is the best way.

 From: Pieter Wuille <pieter.wuille at gmail.com>
To: Zooko Wilcox-O'Hearn <zooko at zooko.com> 
Cc: Bitcoin Dev <bitcoin-development at lists.sourceforge.net> 
Sent: Wednesday, February 29, 2012 4:47 PM
Subject: Re: [Bitcoin-development] Duplicate transactions vulnerability
On Tue, Feb 28, 2012 at 06:41:31PM -0700, Zooko Wilcox-O'Hearn wrote:
> Could you spell out the attack explicitly? Presumably there aren't a
> lot of people with the "malice energy" to perform the attack but not
> to figure it out for themselves. I, however, have the "niceness
> energy" to think about it for a few minutes but not to figure it out
> for myself. If in your opinion it is realistically dangerous to post
> it publicly, would you be so kind as to include me in the private
> sharing of the explanation?

It's not exactly a secret anymore, as the patch also references it.
Russell O'Connor described the attack on his blog:


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