Coldcard Entropy Flaw: 1,816 BTC Drained, AI Finds More
Four lines of firmware code from March 2021 compressed seed entropy to ~40 bits, and attackers swept $116M from offline wallets. The Bitcoin Red Team's response — 390 projects scanned, 4,962 findings — exposed a harder problem: defenders lost API access in 20 minutes while attackers face no such limits.






