Wallet dossier
Bitkey
Bitcoin self-custody wallet system combining hardware, a mobile application, and a provider-assisted server key in a 2-of-3 multisignature architecture.
- Developer / company
- Block, Inc.
- Origin
- United States
- Launch
- 2023
- Custody
- hybrid
- Confidence
- high
- Last verified
- 2026-08-14
Product family
Products
First-generation Bitkey hardware device shipped as part of the integrated wallet system.
Mobile application holding the app key and coordinating Bitkey wallet functions.
Second-generation Bitkey hardware device with an on-device screen for transaction and sensitive-setting verification.
Chronology
Lifecycle timeline
Bitkey began shipping
Bitkey exited pre-order status and began shipping its integrated hardware-and-mobile self-custody system.
Second-generation Bitkey introduced
Product: Bitkey Hardware (2nd generation)
Bitkey introduced a new hardware generation with an on-device screen while retaining the 2-of-3 multisignature system.
Relationship-enrollment randomness bug disclosed
Product: Bitkey Mobile App
Bitkey disclosed that the mobile app used a non-cryptographic random-number generator for a one-time relationship-enrollment secret. The demonstrated practical path was limited to narrow second-generation recovery-contact or inheritance flows and did not weaken wallet spending keys.
Sources