“Scientists are also to put tiny LEDs to a new use in the lab and eventually in commercial internet connections — quantum cryptography. Tiny streams of photons in the system would pass from the LED to the a detector. Any interception of the beam (ie. snooping) would result in the signal being altered, as per the observer effect. Such a system, when properly implemented would be in theory immune to any sort of malicious interception between the sender and the receiver.
Yet another use for the little lights has been proposed by scientists — this one with promise of bringing new high-tech hope to impoverished regions. One of the world’s largest problems is the lack of clean drinking water in third-world nations