MetaMask Login | configurations
User configurations are stored on MetaMask servers, encrypted with a specially generated key only the user owns. Nobody other than the user can read the configurations.
We are also actively working with the ecosystem to explore opportunities to decentralize the user configuration storage in the future.
Which user configurations do you store?
We store preferences and configurations, which can include, for example, your public address, currency, favorite tokens, interface settings, or address book. We don’t store, transfer, or backup your private key or Secret Recovery Phrase, both of which are only accessible to you.
How do wallet activity notifications work?
We monitor blockchains for you and send you push notifications when something relevant happens to your addresses, like receiving tokens, NFTs, or unstaking. Different from the user configuration service, which only hosts data encrypted client-side, the notifications service needs to save unencrypted versions of the monitored addresses on the server side. To ensure that multiple addresses cannot be attributed to the same person, our servers save the notifications tasks “untied” to the users they belong to. This means that the link between the AccountIDs and the addresses is only stored client-side.
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