Each password is randomly generated - so you have to solve the puzzle.
Solution: There are two parts of the password. There is a Russian office upstairs with a map on the wall. Intel #3: In the 'Redlight, Greenlight' mission, in the American Street simulation, go to the bar to the right of the Burger Town. In the room where they are held is a broadcast intel collectible on the desk. Intel #2: In the 'Brick In The Wall' mission, complete the secondary objective to rescue or silence the captured German spy. Intel #1: In the 'Nowhere Left To Run' mission, when interrogating Qasim, talk to him instead of immediately killing him. Note: This secret mission slightly alters the outcome of your ending. To unlock the 'Operation: Chaos' mission, collect three pieces of intel in three missions and solve a puzzle at the safehouse.