> I have reviewed the current enhancement/feature requests
> 1169129 relating to "SYSDBA password in both security and database"
> 954769 relating to "Stand-alone databases"

The extra complication you are requesting will not achieve any
real increase in security.

You, and the authors of these requests, should probably read
this article...
http://www.firebirdsql.org/index.php?op=doc&sub=contrib&id=fb_meta_security

It does not address your particular proposals directly, but it
does discuss the impracticality of security by obscurity (the
essence of your proposals) in an open source project.

--
Geoff Worboys
Telesis Computing