With the phenomenal speed to be expected from quantum computers in the future, todays encryption techniques such as RSA will be pretty much useless. A quantum computer could factorise 600bit+ numbers in a relatively short period of time. Aside from Shor's algorithm, are there any other mathematicians out there who are trying to invent a new algorithm? It just hit me that when quantum computing starts to take over a "new internet" will need to be created. Any security we have at the moment will just be too weak. Networking, programming, websites, wireless, every aspect of security we have today will be completely useless due to the tremendous power that comes with quantum computing.