Superactivation, unlockability, and secrecy distribution of bound information

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Bound information, a cryptographic classical analog of bound entanglement, is defined as classical secret correlations from which no secret key can be extracted. Its existence was conjectured and shown in a multipartite case. In this work, we provide an example of bound information in a four-partite scenario. Later, using this example, we prove that bound information can be superactivated and moreover unlockable in a finite-copy scenario. We also show that bound entangled states (bound information) can be used to distribute multipartite pure-state entanglements (secret keys).
Publisher
AMER PHYSICAL SOC
Issue Date
2011-04
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW A, v.83, no.4

ISSN
1050-2947
DOI
10.1103/PhysRevA.83.042336
URI
http://hdl.handle.net/10203/244376
Appears in Collection
EE-Journal Papers(저널논문)
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