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I am wondering if there is any available threshold crypto library that is well-audited and ready to be used in production. Any pointer is appreciated.

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The ZenGo k-of-n multi-party ECDSA library, written in Rust, has been audited by Kudelski security in late 2019. See the audit report here.

Kostas Kryptos
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  • We have created a WebAssembly port of the project so you can use it everywhere (e.g. The browser): https://github.com/CoinFabrik/wasm-multi-party-ecdsa – sw. Aug 06 '23 at 02:54