No, it's not faster than light. It can't be. You have to physically pass particles around to communicate, and those move at a normal speed. https://en.wikipedi

No, it's not faster than light. It can't be. You have to physically pass particles around to communicate, and those move at a normal speed. https://en.wikipedia.org/wiki/No-communication_theorem https://en.wikipedia.org/wiki/No-communication_theorem All quantum cryptography does is make the photons you send tamper-evident. You can use it to establish a shared key that can't be snooped on, and then use that to communicate using ordinary symmetric cryptography. Of course, asymmetric crypto does this fine, so unless you are very suspicious of modern asymmetric crypto you probably don't need it.