Authentication in GNUCash

[Shenbaga Kumar S]

Hi
 I am using GNUCash for the last 1 month. I am surprised by the fact that
there is no initial authentication when I open GNUCash. All my accounts are
visible right after opening GNUCash. I went through the mailing lists and
could find info only about encrypting the data. Is there no simple
'Username', 'Password' authentication mechanism in GNUCash?

Regards
Shenbaga Kumar