Phys.org is reporting yet another quantum leap towards quantum computing technologies and encryptions, and this one, I can imagine, has them burning a bit of midnight oil in the intelligence agencies of the West, analyzing the potentialities and implications:
Such a process implied that we have taken yet another step toward the sought-after holy grail of information processing, quantum computing, able to encode information by altering the quantum states of particles, but here, notably, the technique also allows for up to four copies, and a significant ability to detect attempts to crack encrypted information, since this would result in alterations of the quantum states themselves. The reason why is locked within the fundamental Uncertainty principle of quantum mechanics itself, which states that one cannot measure the position and velocity of an electron at one and the same time. THus, an experimenter determines the result of an observation or measurement prior to performing the experiment itself, and to that extent, has a hand in determining reality.
What probably has them burning the midnight oil in Western intelligence agencies is the fact that this technique is being reported from China, and that raises the specter that what may actually have been accomplished in China may be much more significant, and that will have the analysts proposing certain inevitable procedures. The first will be to test and verify the Chinese claims. If verified, then the analysts will be forced to extrapolate on what China may not be telling, and that will generate more black projects research, if it is not already underway (which it probably is).
The other thing that will have them worrying is the encryption potentials of quantum computing, for as a bit of reflection will reveal, it holds the promise of security of communications that would make today's standards quickly obsolete... which is bad news for an elite determined to rein in the internet and monitor private communications. For this reason alone, I would think, one should not be too optimistic that quantum computers - if and when they are actually available - will make it to the open market too readily....