BlueWallet details key generation process following hardware wallet vulnerability

BlueWallet has published a transparent breakdown of how it generates the cryptographic keys that control user funds, relying on the operating system's built-in cryptographically secure random number generator rather than a custom-built implementation. The piece notes this approach benefits from scrutiny across the entire mobile security ecosystem rather than being confined to one company's internal code review—a meaningfully different risk profile from the bespoke randomness implementation that failed in Coldcard's hardware.

For users seeking additional security, BlueWallet version 8.0.0 and later allow manual entropy injection during wallet creation. The process involves physically generating randomness—through coin flips or dice rolls—and recording the results into the app until reaching 256 bits of entropy, the standard threshold for a fully secure Bitcoin seed phrase. If manual input falls short of that target, BlueWallet automatically fills the gap using the device's system RNG, ensuring the seed phrase is never under-randomized.