5 ms·
The quantum part simply allows perfect distribution of keys. So person A can tell person B what key to use, and person B can know with certainty that nobody els
by vectorjohn 11y ago
The quantum part simply allows perfect distribution of keys. So person A can tell person B what key to use, and person B can know with certainty that nobody else saw it. Then they just use regular encryption.
- kristopolous 11y agoDoes asymmetric key exchange handle this problem, or am I missing some attack vector?
- vectorjohn 11y agoWell, I'm not actually sure if there's any problem with asymmetric keys, now. I think, since asymmetric keys depend on factors of big prime numbers, they are vulnerable to quantum computers actually. Whenever those start working, keys become easily breakable. https://en.wikipedia.org/wiki/Post-quantum_cryptography https://en.wikipedia.org/wiki/Post-quantum_cryptography
- kristopolous 11y agoNo it doesn't. It depends on the existence of asymmetric algorithms. There's as far as I know, a number of classes of algorithms that have a good potential to satisfy this.
- vectorjohn 11y agoThat sounds neat, but we're not using any of those. And I don't see a [0] with a link anywhere in your comment. What I read, cited above, said that all existing asymmetric key algorithms are easily broken with quantum computers.