Demonstrating a feat that was until recently thought to be impossible, researchers in Geneva, Singapore, Cambridge and Waterloo, Ontario have "unconditionally guaranteed" the security and sanctity of a message transmitted between two points on earth. Their work (pdf) could lead to impenetrable communications networks for financial trading, online voting, or an endless variety of other tasks currently carried out on the internet.
As I wrote in an earlier post the world of quantum computing and cryptography shows great promise for the future, particularly in overcoming the current problems with encryption and Internet privacy.
Read more: Quantum encryption takes center stage in wake of NSA encryption cracking