Superactivation, unlockability, and secrecy distribution of bound information
Journal Article
·
· Physical Review. A
- Institut de Ciencies Fotoniques, E-08860 Castelldefels, Barcelona (Spain)
- School of Computational Sciences, Korea Institute for Advanced Study, Seoul 130-722 (Korea, Republic of)
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).
- OSTI ID:
- 21544603
- Journal Information:
- Physical Review. A, Vol. 83, Issue 4; Other Information: DOI: 10.1103/PhysRevA.83.042336; (c) 2011 American Institute of Physics; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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