This is to request a feature that would extend the current Identity feature so as to include a secret Identity. This secret identity should require different credentials in order to access its contents.
Currently if someone knows, or forces a user to access his vault, it is easy to see all the contents or know whether there are different identities. With this feature, this secret identity and its contents, can only be seen after login in with a different set of credentials. Alternatively, this could be like the master identity, but users should not be able to see the master identity when others are enabled.
The threat vector here would be an in-person attack.
Since the vault is protected by the master password, an option could be to extend the master password (mp), after a delimiter, everything before the delimiter is the mp, while the complete password is the credential for the secret identity.