Bitcoin Multisig is a feature in the Bitcoin protocol that allows a user to send funds to bitcoin addresses that can only be spent with a transaction that is signed by more than one key, out of a set of separate keys.
By creating multiple keys and distributing these over multiple locations and or owners the scheme can provide backups when a single key is stolen or destroyed, and provides a time delay protecting cold storage funds.
onderzoek naar verschil tussen single sig xpubs en multisig xpubs
tldr: een bip39 seed werkt voor zowel singlesig als multisig, de xpub hangt af van de dervation key. Als je een seed inleest met Seedsigner kan je kiezen of je de xpub voor singlesig of multisig exporteert
You can use a single device and a single seed for both single-sign and multi-sig use. You would need software that supports multi-sig scripts/addresses, but it will grab keys from a different branch of the tree than the keys used for single sig.
In other words, the seed creates a tree of keys and different branches (derivation paths) are used for multi sig than for single sig. The same way a single seed can support multiple cryptocurrencies or address types. That’s all done by using different branches off the same seed. https://www.reddit.com/r/BitcoinBeginners/comments/17i4q6q/can_a_cold_storage_device_used_in_a_multisig/