admin has a different Password for well admin things

[Gaffer]

i was thinking about this and i think this would make my board alot more secure but i'm not sure how to make it

or is there something like this around

what i am meaning by this is when a admin logs into the admin CP or tries to do something else adminwise, s/he uses one password but on the board to login s/he uses another one.

it would also be good if the username and password that are for the admin stuff has a autologout when they leave the admin CP but the the standard one uses cookies or something

i was thinking about this as well as to the fact that i post from college and well people know i'm a admin they might try and do something to my board

anyway would anyone be able to make this for me? .... Pleeeeease!