Quantum data locking for high-rate private communication
Author(s)Lupo, Cosmo; Lloyd, Seth
MetadataShow full item record
We show that, if the accessible information is used as a security quantifier, quantum channels with a certain symmetry can convey private messages at a tremendously high rate, as high as less than one bit below the rate of non-private classical communication. This result is obtained by exploiting the quantum data locking effect. The price to pay to achieve such a high private communication rate is that accessible information security is in general not composable. However, composable security holds against an eavesdropper who is forced to measure her share of the quantum system within a finite time after she gets it.
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering; Massachusetts Institute of Technology. Research Laboratory of Electronics
New Journal of Physics
Lupo, Cosmo, and Seth Lloyd. “Quantum Data Locking for High-Rate Private Communication.” New Journal of Physics 17, no. 3 (March 1, 2015): 033022. © 2015 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft
Final published version