[Bitcoin-development] Duplicate transactions vulnerability

Pieter Wuille pieter.wuille at gmail.com
Wed Feb 29 16:47:48 UTC 2012

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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