Even a casual nosy user might know enough to press alt-F11, see the
sheet in the Project Browser, and set the sheet's Visible property to
xlVisible.

So rather than being "not an absolute secure method", I'd classify it as
an "almost certainly insecure method".

In article ,
steve_doc wrote:

This is not an absolute secure method as a user can still gain access by
setting formula reference to the sheet and retrieving data. but it will stop
the casual nosy user.