Vault Reshare

What is the Reshare feature

Resharing is a feature that can be used to increase or decrease the number of participating devices in a Vault setup. In this setup also a Vultisigner can be included in the Vault setup without moving funds.

How to use the Feature

Do this if a device has been lost in a secure setup and you need to add a new, unique device or update the current shares. If a device of a 2-of-2 setup is lost please use the backup feature.

Click on the above image to watch an explanation video on Twitter

After clicking "Reshare" in the Vultisig Vault menu, the next steps are very similar to creating a Vault, as the reshare feature is just another keygen ceremony.

Start the Reshare with or without the Vultisigner present.

You can increase a vault setup by simply adding a new device, or decrease a vault setup by excluding (not joining with) a device from the keygen ceremony.

When resharing with Vultisigner, the steps are similar, but with the inclusion of the Vultisigner. The server checks if a Vault Share is currently present and requests the password. If a Vault Share is not present, a new share will be created on the server.

When to use the Reshare feature

Like described in the section about what the feature is, it can be used for the following:

Changing the Number of Parties

Changing the number of parties is as simple as joining another keygen session. This gives the ability to change the number of devices participating in a setup. New unique devices can be added or old devices can be excluded.

IMPORTANT NOTE FOR RESHARE

After resharing a vault, the vault shares of each device will also change.

Resharing invalidates the old backups of the shares in Vultisig and increases the risk that mixed backups will be imported and restored. This can result in inaccessible vaults.\