Coldcard Adds New Security Measures After $130 Million Bitcoin Exploit
In brief Coinkite released new Coldcard firmware after a seed-generation flaw exposed users to more than $100 million in Bitcoin thefts. Coldcard now requires users to add randomness through key presses, dice rolls, or coin flips when generating new seeds.
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Key Facts
- Fact 1: In brief Coinkite released new Coldcard firmware after a seed-generation flaw exposed users to more than $100 million in Bitcoin thefts.
- Fact 2: Coldcard maker Coinkite has released a security overhaul for its Bitcoin hardware wallets after a seed-generation flaw allowed attackers to steal more than $100 million in Bitcoin.
- Fact 3: In a blog post on Thursday, Coinkite urged Coldcard Mk4, Mk5, and Q users to upgrade to firmware 5.6.1 or 1.5.1Q.
- Fact 4: “Their work put this firmware under intense, sustained scrutiny and made this release stronger.” In July, attackers began draining Bitcoin from air-gapped Coldcard wallets after exploiting a firmware flaw dating to 2021 that generated some wallet seeds with too little randomness, making their private keys easier to guess.
In brief Coinkite released new Coldcard firmware after a seed-generation flaw exposed users to more than $100 million in Bitcoin thefts. Coldcard now requires users to add randomness through key presses, dice rolls, or coin flips when generating new seeds.
A three-week review also uncovered issues involving transaction signing, USB connections, backups, and other wallet functions. Coldcard maker Coinkite has released a security overhaul for its Bitcoin hardware wallets after a seed-generation flaw allowed attackers to steal more than $100 million in Bitcoin. In a blog post on Thursday, Coinkite urged Coldcard Mk4, Mk5, and Q users to upgrade to firmware 5.6.1 or 1.5.1Q.
(Original synthesis pending human/AI review — generated by the stub provider by selecting real sentences from the source material, not by writing new analysis or commentary.)
Original source: Decrypt
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