Weak Locking Capacity of Quantum Channels Can be Much Larger Than Private Capacity

@article{Winter2015WeakLC,
  title={Weak Locking Capacity of Quantum Channels Can be Much Larger Than Private Capacity},
  author={A. Winter},
  journal={Journal of Cryptology},
  year={2015},
  volume={30},
  pages={1-21}
}
  • A. Winter
  • Published 2015
  • Mathematics, Computer Science, Physics
  • Journal of Cryptology
We show that it is possible for the so-called weak locking capacity of a quantum channel (Guha et al. in Phys Rev X 4:011016, 2014) to be much larger than its private capacity. Both reflect different ways of capturing the notion of reliable communication via a quantum system while leaking almost no information to an eavesdropper; the difference is that the latter imposes an intrinsically quantum security criterion whereas the former requires only a weaker, classical condition. The channels for… Expand
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