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What are User-Controlled Wallets

User-Controlled Wallets are a subtype of MPC Wallets. In a User-Controlled Wallet, end users of your organization are given full control of their digital assets. In this setup, each end user of your organization holds their own unique private key share to their MPC Wallets. With a flexible Threshold Signature Scheme (TSS) (โ€m out of nโ€ key shares), User-Controlled Wallets allow your organization to customize how transactions are authorized. For example, under a 3-3 signature scheme, your organization and your end user each hold a key share, while the third key share is stored within Coboโ€™s multi-cloud infrastructure, and all three are required to independently authorize each transaction. Alternatively, a 2-3 signature scheme can be implemented, where your organizationโ€™s key share is held offline and utilized only in specific circumstances, such as disputes or critical events. To integrate non-custodial MPC Wallets into your applications, a 2-2 signature can be implemented, where your end user holds a key share and the other is stored within Coboโ€™s multi-cloud infrastructure, while your organization holds none.

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3-3 signature scheme

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2-3 signature scheme

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2-2 signature scheme

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Object Model

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Project

A project is a collection of vaults.

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Vault

A vault is a collection of User-Controlled Wallets sharing the same root extended private key.

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Root Extended Private Key

Each vault is associated with a unique root extended private key. This master private key is used within the MPC framework to generate a series of key shares. Each set of key shares is referred to as a private key. You can set up multiple projects, vaults, and wallets to meet the specific requirements of your business.