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How to Create a Signature in MPC
Within MPC, there are actually two technologies. There is what's called Shamir Secret Chair and there's Threshold Signature Ski. The way the math works means that at a certain point of time, the key is reconstructed to sign a message. So essentially you have shares, right? You took a single and single kind of key, you broke it into three but then you reconstructed it to create a signature. That's what Ledger does for instance, right?