Clear DefinitionsBitBox
1 min read
Pronunciation
[bit-boks]
Analogy
BitBox is like a secure safe deposit box for your crypto keys, ensuring they never leave the protected environment.
Definition
A hardware cryptocurrency wallet by Shift Cryptosecurity that securely stores private keys in a tamper‑resistant device.
Key Points Intro
BitBox offers secure key storage with open‑source firmware and backup options.
Key Points
Secure element: Isolates keys in CC EAL5+ certified chip.
Open source: Firmware and host apps publicly auditable.
Multicoin support: Manages BTC, ETH, ERC‑20 tokens, and more.
Backup: MicroSD‑based encrypted backup and Shamir backup.
Example
A user stores their Bitcoin on a BitBox02, uses the touch slider to confirm transactions, and keeps a microSD backup in a safe.
Technical Deep Dive
BitBox02 uses a dual‑chip architecture: an MCU for USB and UI, and a secure element for key operations. Firmware runs in a verified boot chain; host communication uses encrypted USB channels. Backup data is AES‑256 encrypted with user‑provided PIN, stored on microSD with wear leveling.
Security Warning
Physical attackers with prolonged access could attempt side‑channel analysis; store device in secure location.
Caveat
Limited UI (no screen) relies on host software for transaction details; phishing via compromised host remains a risk.
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