Quantum Key Exchange With an Airplane 44
submeta writes "Researchers in Munich have successfully performed a quantum key exchange between a moving aircraft and a ground station. Quantum key distribution, which exploits the phenomenon of entanglement, offers theoretically perfect encryption (although it can be vulnerable in practice). This advance is an important step on the way to key exchange with a satellite, which could enable practical usage of the technology."
A little unclear on entanglement (Score:3, Interesting)
Doesn't entanglement also imply faster-than-light communications between the two quantum nodes? Or does the speed of light still apply to the entangled systems?
If the former, this would eliminate the lag for satellite communications, which would be a major breakthrough in global communications, even if the satellites could only link up to a few ground stations because of the limited number of entangled "transmitters" per satellite.