What are assassins creed secret codes

Lucy's PC: To do this you must get the pass code from the closet after he says, "Someones been in here!" That's for the door. I think if you go out right after that, Lucy's pen will be on the animus.
Vidic's PC: One day vidic will be all happy and have some coffee, he will go and look out the window, you can pickpocket his pen.
Conference room: Read every message on vidic's computer until one inquiring about a pass-code the begin with 10 pops up, then you can do into the conference room, also the PC in there pass-code in in Vidic's PC

Or were you askin for cheats, because there are none...