Galaxy A Quantum(Galaxy A71) is out South Korea, with a "Quantum security chip" developed by SKT, one of the biggest South Korean mobile carrier.  The phone actually seems to get more positive reviews than any other recent Galaxy phones, although most of them are not about the quantum chip thing.

But SKT and Samsung really seem to want people to think that the quantum chip is a big deal. Like, it looks like all the Galaxy A Quantum ads are about Quantum chip making your phone safer. One of their ads, the one that I saw most here and there, shows us how easy it is to make an online purchase with your phone and say that "Quantum chip adds extra security".

But that's not a lot of details. So I looked for their other ads out of pure curiosity, and I found longer and more detailed one. It says that the quantum chip makes "a security codes that is hard to crack even with supercomputers, using unpredictable nature of quantum." They didn't stretch the technology too far. They instead just said "quantum chip adds one extra layer of security to your phone." I think that's the best way to explain this technology. Just another layer of security. They never say about being unbreakable, or that it's dangerous without it. You kinda expect that kind of stretch when you heard that the product name itself has quantum in it.

But one claim that they made that bugs me is this:

a security codes that is hard to crack even with supercomputers

Well, that is correct. Supercomputer will have hard time cracking that quantum security. Virtually impossible, I might say. But that's somewhat misleading too.


What quantum chip really achieved in Galaxy A Quantum is that they made random number almost perfectly random. True random numbers cannot be made digitally because of their nature. So most of the random numbers in computers are all what's called Pseudo-random. They use specific algorithms to amplify tiny differences in given numbers, or seeds. But the problem is, as long as you have the exact same seed to begin with, the randomness breaks. You will get that "random" number again. This is why random numbers in computers are usually called pseudorandom. It is technically not really random. Quantum chip in Galaxy A Quantum uses clever approach to solve this problem. QRNG, or Quantum Random Number Generator, detects photons emitted from LED light and count how many photons were detected. Since the number of emitted photons in a specific area is physically random, it is virtually impossible to willingly recreate given seed, or the number itself, for that matter.

Randomness isn't the problem

Back to being hard to crack even with supercomputers. Yes. That is truth. But that's very misleading. Normal pseudorandom numbers are still hard enough to crack, even with supercomputers. That's why we've been using them with very little issues. Surely QRNG's way is more unpredictable in a physics level. But that doesn't mean it's drastically more secure. In fact, that won't help at all when it comes to traditional way of security breach. Security attack was never on random numbers. Pseudorandom numbers are still practically unbreakable. You don't gain much from being "truly" random. There is currently no security threat you can only stop with Galaxy A Quantum. And that kinda threat won't be around for quite a while.