Are there any characteristics/ lock available so that the program would fail to run on any other device except Raspberry Pi. I have thought about using GPIO with external circuits but would prefer just using software based solution for this problem.
Edit: To people who make assumptions before reading the question. The goal is not for Users to prevent copying. The goal is to engage people in using Raspberry Pi and work on hardware rather than running emulators or using other Linux machines to test their skills at program efficiency. Same machine cycle, same cpu/gpu.