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Coldcard Bitcoin Exploit Explained: Entropy, How Keys Are Generated, and Why Bits Matter - Decrypt

A flaw in Coldcard wallets cost Bitcoin holders more than $100 million—and reopened an old fight about whether you can trust dice.

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Coldcard Bitcoin Exploit Explained: Entropy, How Keys Are Generated, and Why Bits Matter - Decrypt

Coldcard firmware bug cut entropy 128→~40 bits via software PRNG instead of hardware RNG, enabling $130M BTC theft. For tech leaders: one build error sabotages years of crypto security—the real risk isn't math but code flaws.

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sabato 1 agosto 2026·thehackernews.com
Coldcard Hardware Wallet Flaw Linked to $70 Million Bitcoin Theft in 41 Minutes
A Coldcard firmware flaw weakens wallet seed generation across five models, while Galaxy links a 1,196-address, $70.2 million sweep to the bug.
sabato 1 agosto 2026·coindesk.com
Bitcoin cold-wallet attack spreads to 4,500 addresses as losses near $89 million
Galaxy Research flagged a third wave of sweeps tied to weak Coldcard-generated keys, with the attacker now targeting smaller balances and changing how funds are collected onchain.

Coldcard Bitcoin Exploit Explained: Entropy, How Keys Are Generated, and Why Bits Matter - Decrypt

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Coldcard Bitcoin Exploit Explained: Entropy, How Keys Are Generated, and Why Bits Matter - Decrypt

Timeline cronologica

Coldcard Hardware Wallet Flaw Linked to $70 Million Bitcoin Theft in 41 Minutes

Bitcoin cold-wallet attack spreads to 4,500 addresses as losses near $89 million

Coldcard Bitcoin exploit explained: How a firmware bug turned entropy into a ticking time bomb

A Coldcard firmware flaw let hackers drain $70 million in Bitcoin in 41 minutes, with losses now topping $88…

Coldcard Hardware Wallet Flaw Linked to $70 Million Bitcoin Theft in 41 Minutes

Coldcard hack steals $86 million in bitcoin from more than 4,500 wallets

COLDCARD wallet RNG flaw likely linked to $88 million Bitcoin theft

Galaxy Research identifies 1,367 BTC drained in attacks on Coldcard addresses

"Nothing Is 100%": CZ Warns Bitcoin Holders After $89 Million Coldcard Wallet Exploit

Coldcard Bitcoin Exploit Balloons to $88 Million as Attackers Keep Draining Wallets - Decrypt

A Coldcard firmware flaw let hackers drain $70 million in Bitcoin in 41 minutes, with losses now topping $88 million

COLDCARD wallet RNG flaw likely linked to $88 million Bitcoin theft

COLDCARD Predictable RNG: From Seed Recovery to About $8.86M Bitcoin Theft

Hackers exploit Coldcard firmware flaw, stealing $89 million in Bitcoin from thousands of wallets

Coldcard Flaw Exposes Hardware Wallet Testing Blind Spot: Kraken

Hackers target Bitcoin’s safest hiding place in ongoing Coldcard attack

Hackers hit Bitcoin’s safest hiding place in ongoing attack - The Economic Times

Hackers hit Bitcoin’s safest hiding place in ongoing attack

Coldcard breach: How hackers stole $89M from Bitcoin's 'safest' storage

Coldcard hack steals $86 million in bitcoin from more than 4,500 wallets

Coldcard Bitcoin Theft Continues, Estimated Over $114 Million Stolen

Bitcoin community responds swiftly to Coldcard exploit as 1,367 BTC drained from vulnerable wallets

Coldcard Thefts Near $114 Million as Fourth Attack Wave Hits | The Defiant

Bitcoin owners rocked by $116 million hack: What we know about the Coldcard exploit | Fortune

Jameson Lopp says Coldcard exploit exposes limits of Bitcoin's 'don't trust, verify' mantra