Zoom was built for speed. But in its rush to connect us, it may have left a few doors open. We return to a conversation with Dan Guido, the CEO of the cybersecurity firm Trail of Bits. He walks us through how one of Zoom's most mundane features became a hacker's best friend — and why the weakest link in crypto isn't the blockchain … it's the person who thinks they're too smart to get scammed.

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