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A high end consumer GPU could probably crack it in a few seconds using an optimized Pollard's Kangaroo implementation once the public key is revealed.
Yes, that is my understanding too.
Thinking about making the auto boardcast optional/opt-out. Then the user can decide how to boardcast the TX.
Makes the app less hands-off, unfortunately.
A high end consumer GPU could probably crack it in a few seconds using an optimized Pollard's Kangaroo implementation once the public key is revealed.