 An earlier draft of the script had Will Hunting being recruited by  the government to become a cryptanalyst (based on his mathematical  ability). Rob Reiner (qv) reportedly reviewed the script and  advised Matt Damon (qv) and Ben Affleck (qv) to eliminate this  subplot. However, there is a reference to it in the final script:  the scene where Will meets with NSA agents and explains why he  doesnt want to work for them.