Israel already does this, both offense and defense. They have university initiatives that teach "cyber" (I hate that term). It would probably be difficult to get DoD brass to care about this. They're used to their defense products being physical items (warheads, tanks, drones, etc) that are harder to steal. Sure, you can steal the schematics and such, but then you can track purchases of restricted components and gues…
While I agree that this is the way that the DoD will probably look at this program, the better way would be to invest in educating people and spectacular problem solvers and looking at the software as a secondary benefit.
Focusing on a piece of software will get you a piece of software.
Focusing on programmers for the DoD, starting at the middle school or high school level, with broadly available classes and moving into scholarships at the college level will get you people who can continually solve the problems at hand and write the necessary software.