We’ve already discussed the general notions of digital signatures and threshold signatures in a prior post. At Coinbase, we’ve focused our attention specifically on two-party threshold signing; we’ll discuss this setting in this post.DKLs: an introduction. While threshold-signing protocols for the Schnorr and BLS schemes are relatively straightforward, threshold ECDSA is much harder. A number of protocols exist for 2-of-2 ECDSA signing; some target it explicitly (i.e., they don’t support more ge...