Relationship between quantum repeating devices and quantum seals

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He, Guang Ping
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Abstract
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It is revealed that quantum repeating devices and quantum seals have a very close relationship, thus the theory in one field can be applied to the other. Consequently, it is shown that the fidelity bounds and optimality of quantum repeating devices can be violated when they are used for decoding classical information from quantum states, and security bounds for protocols sealing quantum data exist.
Comment: Published version
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Quantum Physics
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