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spenserf
- 16
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I'm finding it absurdly difficult to get detailed information about the exact methods of transmitting quantum encrypted messages. I have a working understanding of quantum mechanics but I'm not a computer scientist. The most I can find is descriptions of QKD which use a quantum channel as well as a public/classical channel to generate a shared key. But... then what? Do the sender/receiver communicate through a classical channel like normal just using the newly generated key? What advantage does this have over a randomly generated predetermined key? That is to say, what use is the QKD in the case that both parties can agree upon a true random key beforehand?
The main point hinges upon the inherent inability to transmit new information without the use of a classical channel. The best I can imagine is a scenario where two parties are essentially two halves of a delayed choice quantum eraser and then communicate through a classical channel to establish coincidence. After which point the coincidence data would have to be encoded.
Can someone help me out here? I'm not seeing what the big fuss is about
The main point hinges upon the inherent inability to transmit new information without the use of a classical channel. The best I can imagine is a scenario where two parties are essentially two halves of a delayed choice quantum eraser and then communicate through a classical channel to establish coincidence. After which point the coincidence data would have to be encoded.
Can someone help me out here? I'm not seeing what the big fuss is about