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What are private keys?

With MPC technology, private key shares are individually generated within separate secure environments, encrypted, and divided amongst multiple parties. A set of key shares jointly form a private key. There are three types of private keys: Main Key, Signing Key, and Recovery Key. The Main Key is the first set of key shares you create before using MPC Wallets. It will be used to create both Signing Keys and Recovery Keys.
To ensure the safety and recoverability of your assets, it is recommended to create at least one Signing Key and one Recovery Key in addition to the Main Key. It is strongly recommended that the same private key share holder (the same TSS Node ID) should not belong to different types of key share private keys simultaneously, such as both the Main Key and the Signing Key. If this situation occurs, please ensure that there is more than one Signing Key.
Main KeySigning KeyRecovery Key
Primary Purposes
  1. Sign transactions (if you have not created Signing Keys)
  2. Create Signing Keys and Recovery Keys
Sign transactions
  1. Create a new Main Key (if your Main Key and the backup copy are lost or compromised)
  2. Recover the whole private key
Required / OptionalRequiredOptionalOptional
Threshold2/2 (You and Cobo each hold one key share, and both are required to sign)2/2 (You and Cobo each hold one key share, and both are required to sign)With Cobo Participation:
2/3 (Cobo holds one key share, and the remaining two key shares are held either entirely by you or jointly by you and a third party. Only two key shares are required to sign.)

Without Cobo Participation
2/2 (Cobo does not hold any key shares. The two key shares are held either entirely by you or jointly by you and a third party. Both key shares are required to sign.)
Max Quantity per Vault11 or more1 (recommended) or more
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