Bitcoin’s Missing Bit

I’ve started a company. It’s called Nummyx. It’s based in Berlin, and it does one thing: offensive security for Bitcoin. Breaking things before attackers do. Audits of the software and hardware people trust with their coins: custody, exchanges, hardware wallets, sidechains, L2s. Under contract, paid for by clients. Here’s why I think it needs to exist. In August, attackers drained at least 1,366 BTC from users of a popular hardware wallet, COLDCARD, roughly $130 million at the time. The cause was a predictable fallback in the device’s random number generator. Block’s engineering te

https://blog.nummyx.com/articles/bitcoins-missing-bit/