Thanks Mad (Flt) Scientist and engineer(retard) for your replies. It sure was constructive.
I know there has been some research on aircraft displays in the US which displays the probability of an aircraft being of a certain type but it was only simulations-based and as such I wanted to know whether anyone had concrete evidence of such a technology but I believe the real answer would stay within the military walls for ages before going out as you know military engages into loads on low profile stuffs and techs.
Thanks.