I view quantum cryptography as mostly hype. Quantum cryptography doesn't solve the problem of authentication which is the main challenge when distributing keys (i.e., ensuring the right person is getting them, rather than merely ensuring they weren't intercepted).
The other reason I think it is hype is that it is already obsolete. There is a large number of proposed classical algorithms <https://en.wikipedia.org/wiki/Post-quantum_cryptography> for implementing traditional cryptographic schemes (key agreement, digital signatures, public key encryption, etc.) and are believed immune from quantum attacks. Microsoft <https://www.microsoft.com/en-us/research/project/post-quantum-tls/> and Google <https://security.googleblog.com/2016/07/experimenting-with-post-quantum.html> already have experiments integrating it into TLS (the protocol underlying https). NIST is currently working on standardizing PQS (post-quantum secure) algorithms: https://csrc.nist.gov/Projects/Post-Quantum-Cryptography . Jason On Tue, Jun 16, 2020 at 12:12 PM John Clark <[email protected]> wrote: > Chinese researchers report in the journal Nature that they have used > quantum entanglement and a satellite to send a Cryptographic key over a > record distance of 1120 Kilometers as securely as the laws of physics allow > and do so with unprecedented speed and low error rates. The transmission > speed was about one bit every eight seconds, that may sound slow but it's > several orders of magnitude faster than anything done before, and you'd > only be using it to send the cryptographic key, not an entire message. If > quantum computers become practical it may be the only form of cryptography > that still works. US researchers say it would take at least three years to > equal what the Chinese have done. > > Entanglement-based secure quantum cryptography over 1,120 kilometres > <https://www.nature.com/articles/s41586-020-2401-y> > > > John K Clark > > -- > You received this message because you are subscribed to the Google Groups > "Everything List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/CAJPayv3VK0EvUmXneHayd2n43dn3q9W5V75xX7S6eNn-Q5MQLQ%40mail.gmail.com > <https://groups.google.com/d/msgid/everything-list/CAJPayv3VK0EvUmXneHayd2n43dn3q9W5V75xX7S6eNn-Q5MQLQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CA%2BBCJUiAg0RdHPVQCGexNQ-ZbABa1kM_J4uYaLs0QoN1vzF2CQ%40mail.gmail.com.
