Weak randomness in seed generation across hardware wallets represents a systemic cryptographic risk that can compromise Bitcoin security at scale

"The two disclosures point to the same lesson: when randomness is weak, the rest of the cryptography can be perfectly sound and still fail. A firmware bug that's been shipping in Coldcard devices since 2021 let an attacker guess supposedly random seed phrases from the outside, no physical access, no phishing, no malware required."