70ª Defesa de Dissertação de Mestrado, de Carlos Ivan Henao Osorio

70ª Defesa de Dissertação de Mestrado, de Carlos Ivan Henao Osorio

 

Data Defesa:  10/11/2014 - Horário: 14h

Local: Sala 303 - 3º andar - Bloco B

 

Título:  Robustness against Noise and Efficiency of Two-Way Quantum Key Distribution Protocols

 

 

Resumo:

Security of information storage and communication has become a crucial issue for the development and economic competitiveness of any nation. Cryptographic methods that make use of quantum technology are by far more secure than their classical counterparts, thanks to the use of quantum principles that allow detecting the presence of an eavesdropper. We can say that quantum cryptography, based on quantum systems for key distribution (QKD - quantum key distribution) is ready for commercial technology. In April of this year, the Chinese government started to install a 2000 km link of optical fibers between Beijing and Shanghai aimed to perform quantum communication, including QKD  [J. Qiu, Nature 508, 441 (2014)]. In addition, a recent agreement between Los Alamos National Laboratory and Whitewood Encryption Systems, Inc. promises to put QKD technology “at the hand of the average person” [http://phys.org/news/2014-09-quantum-key-technology-everyman.html]. In this work we present new results concerning Two-Way Quantum Key Distribution (TWQKD) protocols. The peculiar feature of TWQKD is that the bits constituting the cryptographic key are transmitted two times (forward and backward) through the quantum channel, instead of only one as in traditional One-Way Protocols, e.g., BB84. Paradigmatic protocols of this kind are LM05 and the "Ping-Pong" protocol. Although initially focused on performing secure direct communication, if used for QKD they can have some pros when compared to One-Way QKD. In particular, TWQKD protocols may be deterministic, meaning that it is possible to decode all the encoded bits and hence to make a more efficient use of the resources. Nonetheless, One-Way protocols can offer a larger security level in the sense that secret keys can be extracted in more noisy environments. We explore how to construct a TWQKD protocol combining efficiency and robustness to noise. Thereby we deduce a protocol and we prove its security for collective attacks. Remarkably, it allows us to show that no deterministic TWQKD protocol can be more robust to noise than the deduced one. Furthermore, we compare the amount of classical communication that it requires with respect to other protocols. On the other hand, we also analyse the performance of TWQKD protocols beyond the typical model of the quantum-depolarizing channel. Regarding this issue we find that the extracted information by an eavesdropper could be reduced if a channel that produces asymmetric noise is employed. We hope that the theoretical results presented here can be experimentally implemented (in near future) in order to verify their usefulness in practical scenarios of security communication.

 

Candidato: Carlos Ivan Henao Osorio

Orientador: Prof. Dr. Roberto Menezes Serra

  

Banca Examinadora

Titulares

  • Orientador: Prof. Dr. Roberto Menezes Serra - UFABC
  • Prof. Dr. Luciano Soares da Cruz - UFABC
  • Prof. Dr. Stephen Patrick Walborn - UFRJ

Suplentes

  • Prof. Dr. Fernando Luis Semiao da Silva - UFABC
  • Prof. Dr. Miled Hassan Youssef Moussa - USP

 

PUBLICAÇÕES RECENTES

Information content in F(R) brane models with nonconstant curvature, Phys. Rev. D 92, 126005 (2015)


Thermal rectification in anharmonic chains under an energy-conserving noise, Phys. Rev. E 92, 062120 (2015)


Multiband electronic characterization of the complex intermetallic cage system Y1−xGdxCo2Zn20, Phys. Rev. B 92, 214414 (2015)


Irreversibility and the Arrow of Time in a Quenched Quantum System, Phys. Rev. Lett. 115, 190601 (2015)


Practical security analysis of two-way quantum-key-distribution protocols based on nonorthogonal states, Phys. Rev. A 92, 052317 (2015)


Tight bound on the trace distance between a realistic device with partially indistinguishable bosons and the ideal Boson Sampling, Phys. Rev. A 91, 063842 (2015)


Hierarchically structured nanowires on and nanosticks in ZnO microtubes, Scientific Reports 5, 15128 (2015)


Microtubes decorated with nanowires, Applied Physics Letters 106, 213104 (2015)


Relaxation dynamics of deeply supercooled confined water in L,L-diphenylalanine micro/nanotubes, Phys. Chem. Chem. Phys. 17, 32126 (2015)


Compact stars with a small electric charge: the limiting radius to mass relation and the maximum mass for incompressible matter, Euro. Phys. J. C, 75, 76 (2015)


Charged black holes in expanding Einstein-de Sitter universes, Classical and Quantum Gravity 32, 115004 (2015)


Numerical relativity simulations of neutron star merger remnants using conservative mesh refinement, Phys. Rev. D 91, 124041 (2015)


DFT+U Simulation of the Ti_4O_7−TiO_2 Interface, Phys. Rev. Applied 3, 024009 (2015)


Partial indistinguishability theory for multiphoton experiments in multiport devices, Phys. Rev. A 91, 013844 (2015)


Coherent measurements in quantum metrology, New Journal of Physics 17, 023057 (2015)


Classical Tests of General Relativity: Brane-World Sun from Minimal Geometric Deformation, Europhysics Letters 110, 40003 (2015)


Configurational Entropy for Travelling Solitons in Lorentz and CPT Breaking Systems, Annals of  Physics 359, 198 (2015)


Thick Braneworlds and the Gibbons-Kallosh-Linde No-go Theorem in the Gauss-Bonnet Framework, Europhysics Letters 110, 20004 (2015)


Questing for Algebraic Mass Dimension One Spinor Fields, European  Physical Journal C 75 (2015) 266


D-oscillons in the standard model extension, Phys. Rev. D 91, 125021 


Non-Markovian qubit dynamics in a circuit-QED setupPhys. Rev. A 91, 022122


Cavity-aided quantum parameter estimation in a bosonic double-well Josephson junctionPhys. Rev. A 91, 033631 (2015)


Thermal transport in out-of-equilibrium quantum harmonic chainsPhys. Rev. E 91, 042116 (2015)


Spinor Fields Classification in Arbitrary Dimensions and New Classes of Spinor Fields on 7-Manifolds, JHEP 1502, 069 (2015)


Regular Bulk Solutions in Brane-worlds with Inhomogeneous Dust and Generalized Dark Radiation, Adv. High Energy Phys. 2015, 59268 (2015)


Holographic Dark Energy Models and Higher Order Generalizations in Dynamical Chern-Simons Modified Gravity, Eur. Phys. J. C 75, 44 (2015)


Spherically symmetric thick branes cosmological evolution, Gen. Rel. Grav. 47, 1840 (2015).

Contato

Endereço Postal // Postal Address

Programa de Pós-Graduação em Física
Universidade Federal do ABC (UFABC)
Campus Santo André, Bloco B, 8º andar.
Rua Santa Adélia, 166, 09210-170, Santo André, SP, Brasil
 

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