Re:Bitwarden Acquires Passwordless.dev
by fluidcruft on Saturday January 21, 2023 @11:01AM
(#34467288)
A mobile app could easily facilitate that by storing a "passphrase prefix" (or suffix, etc) using biometrics/device key and requiring users to enter the remainder if you don't trust the device to store the entire thing.
1P would allow you to have a password like "1234" and still have the same key entropy as that 10 word password alone.