scholarly journals Framework for covert and secret key expansion over classical-quantum channels

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
Mehrdad Tahmasbi ◽  
Matthieu R. Bloch
Keyword(s):  
Quantum Channels ◽  
Secret Key ◽  
Classical Quantum

scholarly journals Polar Codes for Classical-Quantum Channels

2013 ◽  
Vol 59 (2) ◽  
pp. 1175-1187 ◽  
Author(s):  
Mark M. Wilde ◽  
Saikat Guha
Keyword(s):  
Polar Codes ◽  
Quantum Channels ◽  
Classical Quantum

scholarly journals SECURITY OF A NEW TWO-WAY CONTINUOUS-VARIABLE QUANTUM KEY DISTRIBUTION PROTOCOL

2012 ◽  
Vol 10 (05) ◽  
pp. 1250059 ◽  
Author(s):  
MAOZHU SUN ◽  
XIANG PENG ◽  
YUJIE SHEN ◽  
HONG GUO
Keyword(s):  
Quantum Key Distribution ◽  
Key Distribution ◽  
Continuous Variable ◽  
Excess Noise ◽  
Noisy Channel ◽  
Quantum Channels ◽  
Secret Key ◽  
Transmission Distance ◽  
The Family ◽  
The One

The original two-way continuous-variable quantum-key-distribution (CV-QKD) protocols [S. Pirandola, S. Mancini, S. Lloyd and S. L. Braunstein, Nat. Phys. 4 (2008) 726] give the security against the collective attack on the condition of the tomography of the quantum channels. We propose a family of new two-way CV-QKD protocols and prove their security against collective entangling cloner attacks without the tomography of the quantum channels. The simulation result indicates that the new protocols maintain the same advantage as the original two-way protocols whose tolerable excess noise surpasses that of the one-way CV-QKD protocol. We also show that all sub-protocols within the family have higher secret key rate and much longer transmission distance than the one-way CV-QKD protocol for the noisy channel.

Covert and Secret Key Expansion Over Quantum Channels Under Collective Attacks

2020 ◽  
Vol 66 (11) ◽  
pp. 7113-7131
Author(s):  
Mehrdad Tahmasbi ◽  
Matthieu R. Bloch
Keyword(s):  
Quantum Channels ◽  
Secret Key
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