On Thu, Feb 16, 2023 at 7:30 AM Murray S. Kucherawy <superu...@gmail.com>
wrote:

>
> If my prior formulation is right, i.e., that the attack only takes a few
> seconds to complete, what "x=" value are we proposing that will work here
> without also bringing undesirable side effects?
>
>
The biggest current problem with replay is that it happens in bulk, at
substantial scale. x= is effective against that because it takes time to
send millions of messages.  Is it perfect? No. But it's not difficult to
choose between 10,000 replays using my domain vs. millions.
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