Security of direct communication quantum channel with feedback. (English) Zbl 1338.81115
Summary: In the direct communication quantum channels, the authorized recipient (Bob) and the non-authorized recipient (Eve) have different abilities for verification of received information. Bob can apply the feedback to commit the sender (Alice) to perform verification. Eve has to use for verification an indirect method based on the measurement of a set of incompatible observables enough for determination of the coding basis used by Alice.{
}In the protocol of direct communication, regular modification of coding basis and masking it with an equilibrium in average information carrier density matrix prevents reconstruction of coding basis by the results of Eve’s measurements of an arbitrary set of observables. This provides unconditional security of the channel.
MSC:
81P45 | Quantum information, communication, networks (quantum-theoretic aspects) |
94A40 | Channel models (including quantum) in information and communication theory |
81Q93 | Quantum control |
93D15 | Stabilization of systems by feedback |
References:
[1] | 1. C. H. Bennett and G. Brassard, Quantum cryptography: Public key distribution and coin tossing, Proc. IEEE Int. Conf. on Computers, Systems, and Signal Processing, Bangalore, India, (1984), pp. 175-179. · Zbl 1306.81030 |
[2] | 2. A. K. Ekert, Phys. Rev. Lett.67 (1991) 661. genRefLink(16, ’S0219749915500628BIB002’, ’10.1103 |
[3] | 3. W. K. Wootters, Found. Phys.36 (2006) 112. genRefLink(16, ’S0219749915500628BIB003’, ’10.1007 |
[4] | 4. N. Lutkenhaus, Theory of Quantum Key Distribution, Lectures on Quantum Information (Wiley, NY, 2006). genRefLink(16, ’S0219749915500628BIB004’, ’10.1002 |
[5] | 5. C. V. Usenko, J. Phys., Conf. Ser.442 (2013) 012061. genRefLink(16, ’S0219749915500628BIB005’, ’10.1088 |
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