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DOI: 10.4230/LIPIcs.TQC.2016.2
URN: urn:nbn:de:0030-drops-66830
URL: http://drops.dagstuhl.de/opus/volltexte/2016/6683/
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Arnon-Friedman, Rotem ; Portmann, Christopher ; Scholz, Volkher B.

Quantum-Proof Multi-Source Randomness Extractors in the Markov Model

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Abstract

Randomness extractors, widely used in classical and quantum cryptography and other fields of computer science, e.g., derandomization, are functions which generate almost uniform randomness from weak sources of randomness. In the quantum setting one must take into account the quantum side information held by an adversary which might be used to break the security of the extractor. In the case of seeded extractors the presence of quantum side information has been extensively studied. For multi-source extractors one can easily see that high conditional min-entropy is not sufficient to guarantee security against arbitrary side information, even in the classical case. Hence, the interesting question is under which models of (both quantum and classical) side information multi-source extractors remain secure. In this work we suggest a natural model of side information, which we call the Markov model, and prove that any multi-source extractor remains secure in the presence of quantum side information of this type (albeit with weaker parameters). This improves on previous results in which more restricted models were considered or the security of only some types of extractors was shown.

BibTeX - Entry

@InProceedings{arnonfriedman_et_al:LIPIcs:2016:6683,
  author =	{Rotem Arnon-Friedman and Christopher Portmann and Volkher B. Scholz},
  title =	{{Quantum-Proof Multi-Source Randomness Extractors in the Markov Model}},
  booktitle =	{11th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2016)},
  pages =	{2:1--2:34},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-019-4},
  ISSN =	{1868-8969},
  year =	{2016},
  volume =	{61},
  editor =	{Anne Broadbent},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2016/6683},
  URN =		{urn:nbn:de:0030-drops-66830},
  doi =		{10.4230/LIPIcs.TQC.2016.2},
  annote =	{Keywords: Quantum proof randomness extractors, multisource extractors, device independent quantum cryptography}
}

Keywords: Quantum proof randomness extractors, multisource extractors, device independent quantum cryptography
Seminar: 11th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2016)
Issue Date: 2016
Date of publication: 13.09.2016


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