On 07/10/2014 04:16 p.m., Gregory Maxwell wrote:
> Then I spend the output of the fraudulent spend nlocked
> one block higher, and spend the output of that one again, nlocked one
> block higher, and so on... each step paying fees.
Yes, you're right. I didn't consider that case. But the problem is that
this is not automatic. Currently there is a clear division between
miners how will not take the kickback (irrrational) and miners who will
If somebody modifies the bitcoind to make this choice automatic, then
DECOR+ is the only solution I know about to avoid people doing anonymous
double-spends (with chained kickbacks, as you mention).
The  "locktime on normal transactions" you proposed does not solve the
problem, just diminishes it in a constant value (which currently is very

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