a security / privacy settings question.

[Karen Lewellen]

hi folks,
I may wait to address this, but since my hmemate and I will be addressing 
the log in password request happening every time a awaken the mac 
tomorrow, thought I would ask about this.
I understand from another, and far more informed apple accessibility team 
member that I can either turn off the password request, or decide how 
often I want the request to happen, anyone have an idea how much time is 
possible?
Also, thoughts on the safety of allowing downloads only from the apple 
store, and  trusted developers?
Thanks,
Kare