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By Daniel ZhouFROST is a round-optimal threshold Schnorr signature protocol. Here we introduce why Coinbase decided to use FROST, what FROST is, and what we discovered while evaluating FROST.Why FROST?In order to improve efficiency of Coinbase’s threshold-signing systems, we decided to explore the FROST threshold Schnorr signature protocol, which features the following advantages over other Schnorr-based threshold signature protocols [GJKR03, SS01]:Low round complexity in both the distributed ke...