Perhaps this is an overly broad question... ;-)
Broadly interpreted you are asking if one can implement various fraud prevention algorithms in Mathematica. The answer is certainly, again broadly, yes.
So, one can implement encryption algorithms in Mathematica, One can implement steganography algorithms in Mathematica. One could write (and there also are 3rd party tools for this) implement neural network algorithms in Mathematica.... or any of a wide variety of classification algorithm methods.
So, the devil is in the details. Do you have particular techniques in mind? And for those techniques do you have an application area in mind?