Nils Amiet & Marco Maccetti: Polynonce — A New Attack on ECDSA

A DEF CON 31 talk on a new attack against the ECDSA digital signature algorithm. The researchers demonstrate how it can be applied to real-world data, including transactions on Bitcoin and Ethereum networks.

Blockchain analysis revealed evidence of ongoing attacks targeting vulnerable wallets.

The authors also released a research paper and open-source code to help developers test their systems for this vulnerability.