Top secret my *ss.

The 'codes' are the keypad sequence for opening jetway doors. Setting aside how much damage a terrorist could actually do with them, I should point out that anyone sitting in the gate area waiting for a plane can, with moderate powers of observation, ascertain the code (gasp !) .

I don't know how often they get changed, but it isn't daily.

Not a huge deal, and it's happened before but without the media hype.