Bitcoin's BITVM3 Bridge #Bitcoin #BitVM3

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There is a PDF on bitvm.org whose first page is stamped RETRACTED - SECURITY BREAK DISCOVERED. It was the most hyped Bitcoin upgrade of summer 2025 - BitVM3, the garbled-circuit design meant to make Bitcoin bridges about a thousand times cheaper to dispute. Within a month, researchers broke it. And then the idea got rebuilt in public - partly by one of the researchers who broke it.