
Lead story · Security
Coldcard's seeds have been short of randomness since 2021, and 594 bitcoin have gone
A build flag set to zero in March 2021 replaced Coldcard's hardware random number generator with a software fallback. Mk3 seeds made since carry about 40 bits of real randomness against a 128-bit target, and 594.48 BTC was swept out of 500 wallets.

















