I recently read an article that talked about the possibility of a completely secure data transfer using quantum entanglement. Essentially what that means in terms of computer data and packets is that the data becomes correlated with each other and shares properties. Hypothetically speaking, if you send 50 packets, all packets could take the same properties of the first packet, therefore making it impossible to see what the total outcome of all 50 packets contains.
Until now, the entanglement was only controllable for up to a second, but a recent advancement at the University of Copenhagen’s Niels Bohr institute have been able to keep this entanglement active for up to an hour. This could enable you to be able to make direct connections between two systems, and when you make a change on one end the other end will know and it can all be transferred directly over the internet.
Scientists are currently working on ways to incorporate this into both networking and the internet. Although this is cutting edge and in my honest opinion pretty cool, it may be some time before this would ever reach a PC near you.