Coldcard Hack Exposes Weaknesses in Offline Storage Methods

Coldcard, a hardware wallet made by Toronto-based Coinkite, has been hacked. The breach affected some of its users who had their private keys compromised due to a bug in the firmware.

The issue arose during seed generation when the random numbers used to create the private keys were weakened. A predictable key is one that can be easily guessed by someone else, making it vulnerable to hacking.

CoinKite has refused to estimate the losses resulting from the hack, instead pointing users to a research paper that provides more information on the breach.

This incident serves as a reminder that even offline storage methods are not foolproof and can have bugs. It highlights the importance of self-custody in cryptocurrency, where users take responsibility for their own assets rather than relying on third-party services.