4 ms·
But the man in the middle would just do the receiving and then resending it to the real recipient with a new key.
by gliptic 5y ago
But the man in the middle would just do the receiving and then resending it to the real recipient with a new key.
- baby 5y agoNo but see, they would need to have QKD technology which is too complex and expensive.
- bitwize 5y agoIf the "man" in the middle is the NSA, no expense will be spared.
- arksingrad 5y agoMITM can only re-send the correct key if he knows the correct basis to measure in for every qubbit. The probability that he measures in the correct basis for every qubit is exponentially unlikely as the length of the bitstring grows. He can't just forward along the proper qubit to the receiver in this case.
- gliptic 5y agoBut he has man-in-the-middle'd the channel over which that is communicated too. If the benefit is merely that he would need to hijack two different channels, you could just do classical crypto and splitting the key into two parts (e.g. XOR with random bits) and send those over two channels.