Superactivation, unlockability, and secrecy distribution of bound information

Journal Article · Fri Apr 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.042336· OSTI ID:21544603

Prettico, Giuseppe ^[1]; Bae, Joonwoo ^[2]

---

1. Institut de Ciencies Fotoniques, E-08860 Castelldefels, Barcelona (Spain)
2. 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, Journal Name: Physical Review. A Journal Issue: 4 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CRYPTOGRAPHY
DISTRIBUTION
INFORMATION
QUANTUM CRYPTOGRAPHY
QUANTUM ENTANGLEMENT
QUANTUM INFORMATION