For questions about quantum key distribution (QKD). It is a secure communication method which implements a cryptographic protocol involving components of quantum mechanics. (Wikipedia) In case it's also a question about quantum-cryptography, use the [cryptography] tag along with this.
Questions tagged [key-distribution]
33 questions
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2 answers
Why is the efficiency of Ekert 91 Protocol 25%?
In Cabello's paper Quantum key distribution without alternative measurements, the author said "the number of useful random bits shared by Alice and Bob by transmitted qubit, before checking for eavesdropping, is 0.5 bits by transmitted qubit, both…
Lynn
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Quantum bit error rate
I am trying to understand the quantum key distribution and Quantum Bit Error Rate (QBER). I have question: Why is the QBER given by the average of the diagonals of the crosstalk matrix? Why the need to calculate the value using the diagonals?
Rasha rashed
1
vote
1 answer
BB84 and B92 protocols: what is maximum and minimum bits that Alice and Bob might agree on?
Say Alice wants to transmit a 10-bit key.
For the BB84 protocol, if we assume that Alice and Bob use the same basis to encode and decode 6 qubits (and different ones for the other 4), then what would be the maximum and minimum bits they might agree…
David
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