Is your bitcoin protected against weak key generation?
The July 2026 Coldcard incident caused many people to lose bitcoin due to a key generation vulnerability. Learn how to protect yourself.
What’s in the guide?
A practical guide to how bitcoin keys are actually created, covering the entropy sources inside popular hardware wallets, the chip manufacturers they share, how to generate a key yourself with coins or dice, and why multisig remains the strongest protection against a flawed key.
Why generating a bitcoin key randomly is a harder problem than it sounds
What PRNGs and TRNGs are, and how they differ
Which chip manufacturers sit inside popular hardware wallets, and where the overlap undermines multisig diversification
How to generate your own key with coins or dice, and convert it into a valid seed phrase
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