SQL*Plus security details needed (newbie question)

Could someone explain or point me in the right direction... I'm looking for details on how security works in the SQL*Plus logon. Where is it stored, when/how is it setup, etc. I'm working off a 90-day evaluation copy downloaded off the WEB and can't seem to get it working (I've tried the Scott-Tiger combo with no luck).

If this is too complicated, any suggestions on good reading material would also be appreciated.

Thanks in advance.

--             
                       Brian F. Haddock
                   -- SparTech Software --
                    Burleson, Tx USA 76028

You know you have achieved perfection in design, not when you have nothing more to add, but what you have nothing more to take away.

• Antoine de Saint Exupery.