Non-secret correlations can be used to distribute secrecy

Abstract

A counter-intuitive result in entanglement theory was shown in [PRL 91 037902 (2003)], namely that entanglement can be distributed by sending a separable state through a quantum channel. In this work, following an analogy between the entanglement and secret key distillation scenarios, we derive its classical analog: secrecy can be distributed by sending non-secret correlations through a private channel. This strengthens the close relation between entanglement and secrecy.

4 pages

References in corpus (6)

• Quantum information can be negative
• "Squashed Entanglement" - An Additive Entanglement Measure
• Secure key from bound entanglement
• Separable states can be used to distribute entanglement
• Quantum correlations and secret bits
• Multipartite Bound Information exists and can be activated

Cited by in corpus (7)

• Quantum Discord and its Role in Quantum Information Theory
• Optimal approximate transpose map via quantum designs and its applications to entanglement detection
• Public and private communication with a quantum channel and a secret key
• Round Complexity in the Local Transformations of Quantum and Classical States
• A Classical Analog to Entanglement Reversibility
• Gaussian intrinsic entanglement: An entanglement quantifier based on secret correlations
• Gaussian multipartite bound information