i don't think it's something to worry about - i'm sure pretty much all airliners from now will have similar control systems internally. unless someone knows the exact architecture of the systems inside it'll be nigh on impossible to reprogram, let alone decrypt, and recode using similar encryption.
software designers do this kind of coding professionally and thoroughly (one would hope). only the top maybe 1-2% of hacker/programmers in the world would be able to do anything to the system for it to be remotely affected - and the chances of those people getting access to the aircraft for enough time?
Last edited by AndoniP; 31st May 2012 at 08:45.