Maintenance and security, Python?

Since I learn fastest through practice and analysis, I want to program the things I need using YouTube tutorials. It involves things like contact forms, user login systems, newsletters, and similar things, all using Python. The only problem, logically, would be maintenance and security. I'll be careful to choose good and secure tutorials, but I'd…

Must every effort be made to prevent terrorist states or private companies and individuals from building and operating their own supercomputers?

With this (superbotnet, supercomputer, enormous computing power; several trillions to quintillions of FLOPS), they could quickly and easily circumvent all conventional digital encryption. This would take hacking to the next level and pose a huge threat to digitalized societies!