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Coldcard Hardware Wallet PRNG Flaw Linked to $70M Bitcoin Theft
- Engineer — Learn: A 2021 firmware error routed Coldcard seed generation to a deterministic software PRNG instead of a hardware source, enabling full wallet recovery at scale — a textbook cautionary example for any engineer implementing cryptographic key generation. If your organization holds BTC in Coldcard devices, treat this as Act and audit key provenance immediately.
- SOC/IR — Skip
- Leader — Learn: A $70M theft traced to a firmware-level entropy flaw in a widely trusted hardware security device illustrates that hardware vendor supply chain risk extends to firmware quality; useful context if your organization holds crypto assets or relies on hardware security modules, but unlikely to require immediate board action for most enterprises.
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