# Hybrid Custody

Hyphen is based on a [Hybrid Custody methodology](https://flow.com/hybrid-custody). Initially, users hand over some of their keys for the sake of UX, but later they can obtain 100% control over their account when desired. In other words, it can be seen as [structurally centralized, but politically decentralized](https://medium.com/@VitalikButerin/the-meaning-of-decentralization-a0c92b76a274).

## Method A. Account Linking

Users can link their wallets to the Hyphen Multi-Sig account. Here, 'linking' means the user's wallet becomes the Parent Account, and the Hyphen Multi-Sig becomes the Child Account, which falls under the control of the user's wallet.

In Flow, account linking can be possible because the `AuthAccount` capability is implemented natively. Note that after linking the account, the parent wallet must load the child wallet's information as well (e.g., when listing tokens/NFTs for the user, all tokens/NFTs information from all Child Accounts must also be listed).

## Method B. Revoke Custodial Key

You can gain 100% control over the account simply by removing the [Server Key](https://docs.hyphen.at/concepts/hyphen-multi-sig-account/server-key) from the account. Simply, send a transaction to revoke the server key from the Hyphen Multi-Sig account. However, a change/downside of this is that you will have to go through 2FA every time you sign a transaction thereafter.