dorsal/arxiv
View SchemaPrivate Quantum Channels and the Cost of Randomizing Quantum Information
| Authors | Michele Mosca, Alain Tapp, Ronald de Wolf |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0003101 |
| URL | https://arxiv.org/abs/quant-ph/0003101 |
Abstract
We investigate how a classical private key can be used by two players, connected by an insecure one-way quantum channel, to perform private communication of quantum information. In particular we show that in order to transmit n qubits privately, 2n bits of shared private key are necessary and sufficient. This result may be viewed as the quantum analogue of the classical one-time pad encryption scheme. From the point of view of the eavesdropper, this encryption process can be seen as a randomization of the original state. We thus also obtain strict bounds on the amount of entropy necessary for randomizing n qubits.
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"abstract": "We investigate how a classical private key can be used by two players,\nconnected by an insecure one-way quantum channel, to perform private\ncommunication of quantum information. In particular we show that in order to\ntransmit n qubits privately, 2n bits of shared private key are necessary and\nsufficient. This result may be viewed as the quantum analogue of the classical\none-time pad encryption scheme. From the point of view of the eavesdropper,\nthis encryption process can be seen as a randomization of the original state.\nWe thus also obtain strict bounds on the amount of entropy necessary for\nrandomizing n qubits.",
"arxiv_id": "quant-ph/0003101",
"authors": [
"Michele Mosca",
"Alain Tapp",
"Ronald de Wolf"
],
"categories": [
"quant-ph"
],
"title": "Private Quantum Channels and the Cost of Randomizing Quantum Information",
"url": "https://arxiv.org/abs/quant-ph/0003101"
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