The key unlock was quantum mechanics, which was a big surprise to me because for the last five years we've been doing research on defending against quantum computers. The key primitive that I'm looking at right now is called one-shot signatures, which was discovered in 2020. It gives us perfect finality. Another consequence is that we can reduce the threshold for finality from 66% to 51%. And then another crazy application is proof of location where you have these keys that are uncloneable,. You can prove to the world that you're in a specific geographical location using latency and the speed of light.

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