Physics – Quantum Physics
Scientific paper
2003-03-10
Physics
Quantum Physics
2 pages, 1 figure
Scientific paper
We prove that in the BB84 quantum cryptography protocol Alice and Bob do not
need to make random bases-choice for each qubit: they can keep the same bases
for entire blocks of qubits. It suffices that the raw key consists of many such
qubit-blocks. The practical advantage of reducing the need for random number is
emphasized.
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