On Oct 7, 2015, at 9:02 AM, Eric Lombrozo <elombr...@gmail.com> wrote:
> But a real hashpower supermajority would make such attacks hard to pull off > in practice. If you had a 99% hashpower supermajority on the new version, an attacker would still be able to perform this attack once per day. Since the attacker is creating a transaction which is invalid according to new clients, it will just sit around in old clients' mempool until one of them mines a block.
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