Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum key distribution based on orthogonal states   Quantum key distribution(QKD) is one of the most significant areas in quantum
information theory. For nearly four decades, substantial QKD protocols and
cryptographic methods are developed. In early years, the security of QKD
protocols is depend on switching different bases, which, in fact, is based on
non-orthogonal states. The most famous example is the BB84 protocol. Later,
other techniques were developed for orthogonal states cryptography.
Representations of such protocols include the GV protocol and
order-rearrangement protocols. It might be harder to implement protocols based
on orthogonal states since they require extra techniques to obtain the
security. In this paper, we present two QKD protocols based on orthogonal
states. One of them needs not to employ order-rearrangement techniques while
the other needs. We give analyses of their security and efficiency. Also,
anti-noisy discussions would be given, namely, we modify the protocols such
that they could be implemented in noisy channels as in noiseless ones without
errors. Our protocols are highly efficient when considering consumptions of
both qubits and classical bits while they are robust over several noisy
channels. Moveover, the requirement of maximally entangled states could be less
than previous protocols and so the efficiency of measurements could be
increased.
  Keywords: Quantum key distribution; Order-rearrangement; Orthogonal states;
Noise; Qubit.

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The categories of this paper are: hep-ph
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex