Threshold Cryptography V: Auxiliary Zero-knowledge Proofs
ID: 493245c1-e287-50b4-8d2c-43010cc2933e
STIX ID: report--493245c1-e287-50b4-8d2c-43010cc2933e
Feed Name: CertiK Blog
This post analyzes the auxiliary zero-knowledge proofs used in threshold ECDSA (as implemented in Binance's tss-lib), covering sigma and Schnorr protocols, Paillier modulus proofs (mod and factor proofs), and DLN proofs; it explains how these constructions, informed by CGGMP21/GRSB19/GMR98, address weaknesses in MtA, Paillier parameter generation, and Pedersen setup to mitigate key-extraction attacks and strengthen threshold ECDSA implementations.
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