Coldcard Firmware 5.6.1 Forces User Entropy Into Every New Seed After $100M Exploit

Coldcard now requires 65 key presses after seed exploit, while exposed funds still must move

Coinkite, the maker of the Coldcard Bitcoin hardware wallet, released new standard firmware on Aug. 20 that forces users to add physical randomness whenever they generate a seed. Owners who generate a seed after installing the current fixed release can use the hardened process. Owners still relying on a seed produced by affected firmware must generate another seed and transfer the funds unless that wallet meets the dice-roll exception. During st…

Coldcard Firmware 5.6.1 Forces User Entropy Into Every New Seed After $100M Exploit

Coinkite, the company behind Coldcard, has shipped a firmware update that will not generate a new wallet seed until the owner supplies randomness by hand. That means at least 50 dice rolls, 128 coin flips, or 65 timed key presses, three weeks after a defect in its random number generator opened customer funds to attackers. Coldcard’s two device lines run separate firmware tracks, so the release carries two numbers, 5.6.1 for the Mk4 and Mk5, and…

CoinStats - After the $114 Million Theft, Coldcard Fixes ...

The Canadian hardware wallet is evolving its security after a theft exceeding $114 million. Coldcard releases a new corrected firmware version after an analysis conducted with several AI models. This study was not limited to the initial random number generator. It also examined transactions, USB exchanges, and updates. Affected users must, however, renew their main keys before any fund transfers. L’article After the $114 Million Theft, Coldcard …