A Scalable Simulation of the BB84 Protocol Involving Eavesdropping

2021 ◽  
pp. 91-109
Author(s):  
Mihai-Zicu Mina ◽  
Emil Simion
Keyword(s):  
Bb84 Protocol

scholarly journals DECOY STATE QUANTUM KEY DISTRIBUTION

2005 ◽  
Vol 03 (supp01) ◽  
pp. 143-143 ◽  
Author(s):  
HOI-KWONG LO
Keyword(s):  
Quantum Key Distribution ◽  
Secure Communication ◽  
Key Distribution ◽  
Generation Rate ◽  
Key Generation ◽  
Long Distance ◽  
Decoy State ◽  
Bb84 Protocol ◽  
High Loss ◽  
Statistical Fluctuations

Quantum key distribution (QKD) allows two parties to communicate in absolute security based on the fundamental laws of physics. Up till now, it is widely believed that unconditionally secure QKD based on standard Bennett-Brassard (BB84) protocol is limited in both key generation rate and distance because of imperfect devices. Here, we solve these two problems directly by presenting new protocols that are feasible with only current technology. Surprisingly, our new protocols can make fiber-based QKD unconditionally secure at distances over 100km (for some experiments, such as GYS) and increase the key generation rate from O(η2) in prior art to O(η) where η is the overall transmittance. Our method is to develop the decoy state idea (first proposed by W.-Y. Hwang in "Quantum Key Distribution with High Loss: Toward Global Secure Communication", Phys. Rev. Lett. 91, 057901 (2003)) and consider simple extensions of the BB84 protocol. This part of work is published in "Decoy State Quantum Key Distribution", . We present a general theory of the decoy state protocol and propose a decoy method based on only one signal state and two decoy states. We perform optimization on the choice of intensities of the signal state and the two decoy states. Our result shows that a decoy state protocol with only two types of decoy states—a vacuum and a weak decoy state—asymptotically approaches the theoretical limit of the most general type of decoy state protocols (with an infinite number of decoy states). We also present a one-decoy-state protocol as a special case of Vacuum+Weak decoy method. Moreover, we provide estimations on the effects of statistical fluctuations and suggest that, even for long distance (larger than 100km) QKD, our two-decoy-state protocol can be implemented with only a few hours of experimental data. In conclusion, decoy state quantum key distribution is highly practical. This part of work is published in "Practical Decoy State for Quantum Key Distribution", . We also have done the first experimental demonstration of decoy state quantum key distribution, over 15km of Telecom fibers. This part of work is published in "Experimental Decoy State Quantum Key Distribution Over 15km", .

scholarly journals Secure key rate of the BB84 protocol using finite sample bits

2010 ◽  
Vol 43 (49) ◽  
pp. 495302 ◽  
Author(s):  
Yousuke Sano ◽  
Ryutaroh Matsumoto ◽  
Tomohiko Uyematsu
Keyword(s):  
Finite Sample ◽  
Bb84 Protocol

scholarly journals Secure polarization-independent subcarrier quantum key distribution in optical fiber channel using BB84 protocol with a strong reference

2016 ◽  
Vol 24 (3) ◽  
pp. 2619 ◽  
Author(s):  
A. V. Gleim ◽  
V. I. Egorov ◽  
Yu. V. Nazarov ◽  
S. V. Smirnov ◽  
V. V. Chistyakov ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Quantum Key Distribution ◽  
Key Distribution ◽  
Bb84 Protocol ◽  
Fiber Channel ◽  
Polarization Independent

scholarly journals Complete physical simulation of the entangling-probe attack on the BB84 protocol

2007 ◽  
Author(s):  
Taehyun Kim ◽  
Ingo Stork genannt Wersborg ◽  
Franco N. C. Wong ◽  
Jeffrey H. Shapiro
Keyword(s):  
Physical Simulation ◽  
Bb84 Protocol
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