Year according to a wiki page on the unofficial Signal wiki the backup will not be directly linked to the user “It appears that backups will not be directly linkable to a user. Authentication for operations against a given backup will use zero-knowledge proofs.”.

I think it’s cloud backups.

In the GitHub commit it’s called Renew your Signal Backups subscription.

Though the same I like my conversations disappear when I need to reinstall Signal.

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It makes no sense that the age limit is 18 when most European country’s age of consent is lower than 18. https://en.wikipedia.org/wiki/Age_of_consent_in_Europe