Nunchuk Inc. is an open source, multi-signature mobile wallet for advanced bitcoin security, self-custody, and inheritance. Launched in 2020, the app offers users a feature-rich toolkit to set up high-security bitcoin wallets, with little competition on the mobile app market, as most other mobile wallets do not support multi-signature functionality at all.

Most wallets require a single private key to sign a valid Bitcoin transaction. Multi-signature Bitcoin wallets, in turn, require more than one private key to sign a valid Bitcoin transaction, often a threshold, such as two of three or three of five. This lock, so to speak, is enforced by the full power of the Bitcoin network,…

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