Ben Kaufman(@_benkaufman):A simplified explanation of the Coldcard issue. When you set up your Coldcard it generates a secret - the words it tells you to copy and keep safely. Turns out it was choosing those words in an easily predictable way (instead of randomly), meaning it’s easy to guess which words a Coldcard would choose. Since it’s easy to guess your secret, anyone can know it. This secret is the key to your Bitcoin - meaning anyone who guesses the secret has as much ownership of the Bitcoin as you do, and can steal it to a wallet they control.

2026.07.31 16:46

A simplified explanation of the Coldcard issue. When you set up your Coldcard it generates a secret - the words it tells you to copy and keep safely. Turns out it was choosing those words in an easily predictable way (instead of randomly), meaning it’s easy to guess which words a Coldcard would choose. Since it’s easy to guess your secret, anyone can know it. This secret is the key to your Bitcoin - meaning anyone who guesses the secret has as much ownership of the Bitcoin as you do, and can steal it to a wallet they control.