This story was originally published on HackerNoon at:
https://hackernoon.com/no-one-holds-the-key-threshold-ecdsa-part-1.
A deep dive to threshold elliptic curve digital signature algorithm (ECDSA) and its building blocks: oblivious transfer, MtA, OT-based protocol.
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Threshold ECDSA lets t-of-n parties produce a standard ECDSA signature without anyone ever holding the full private key. Part 1 covers ECDSA basics and nonce pitfalls, commitment-based DKG that blocks rogue-key attacks, the history of threshold ECDSA, the HLNR18 protocol’s trade-offs, and OT-based multiplication.