Volume: 14, Issue: 5(2003)
pp. 741-755 DOI: 10.1142/S012905410300200X
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Abstract |
Full Text (PDF, 859KB)
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| Title: |
ENCRYPTION OF QUANTUM INFORMATION |
| Author(s): |
JAN BOUDA
Faculty of Informatics, Masaryk University,
Botanická 68a, 602 00 Brno, Czech RepublicVLADIMÍ R. BUŽEK
Faculty of Informatics, Masaryk University,
Botanická 68a, 602 00 Brno, Czech Republic
Department of Mathematical Physics,
National University of Ireland, Maynooth, Co. Kildare, Ireland
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| History: |
Received 20 December 2002
Accepted 28 February 2003
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| Abstract: |
We study in detail the problem of encryption of quantum information. We present
an attack on a private quantum channel (PQC) which applies when partial classical
description of a ciphertext is known (the so-called known-ciphertext attack) and we
show how this situation can be avoided. The quantum analogue of the known plaintext
attack is also discussed. We determine how correlations between quantum systems can
be encrypted and we conclude that two PQCs on the subsystems form a PQC on the
whole composite system. Finally, some applications of the PQC are suggested and a
security of a noisy channel is discussed. |
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