Limitations on practical quantum cryptography
@article{Brassard2000LimitationsOP, title={Limitations on practical quantum cryptography}, author={Brassard and Lutkenhaus and Mor and Sanders}, journal={Physical review letters}, year={2000}, volume={85 6}, pages={ 1330-3 } }
We provide limits to practical quantum key distribution, taking into account channel losses, a realistic detection process, and imperfections in the "qubits" sent from the sender to the receiver. As we show, even quantum key distribution with perfect qubits might not be achievable over long distances when the other imperfections are taken into account. Furthermore, existing experimental schemes (based on weak pulses) currently do not offer unconditional security for the reported distances and…
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References
SHOWING 1-10 OF 53 REFERENCES
Quantum cryptography via parametric downconversion
- Physics, Computer Science
- 2002
This work investigates another potential implementation of quantum key distribution: qubits generated using a process of parametric downconversion, and finds that, to first (two-photon) and second (four-Photon) order in the parametricDownconversion small parameter, this implementation is equivalent to the theoretical version.
Quantum cryptography with coherent states.
- Computer Science, PhysicsPhysical review. A, Atomic, molecular, and optical physics
- 1995
This work discusses quantum cryptographic protocols based on the transmission of weak coherent states and presents a system, based on a symbiosis of two existing systems, for which the information available to the eavesdropper is significantly reduced and is therefore safer than the two previous ones.
Security against individual attacks for realistic quantum key distribution
- Computer Science
- 2000
A formula for the secure bit rate per time slot of an experimental setup is obtained which can be used to optimize the performance of existing schemes for the considered scenario.
Experimental Quantum Cryptography
- Computer ScienceEUROCRYPT
- 1990
Initial results from an apparatus and protocol designed to implement quantum public key distribution are described, by which two users exchange a random quantum transmission, consisting of very faint flashes of polarized light, which remains secure against an adversary with unlimited computing power.
Unconditional security in quantum cryptography
- Computer ScienceJACM
- 2001
Basic techniques to prove the unconditional security of quantum crypto graphy are described and a practical variation on the protocol in which the channel is noisy and photos may be lost during the transmission is considered.
Quantum cryptography using any two nonorthogonal states.
- PhysicsPhysical review letters
- 1992
It is shown that in principle any two nonorthogonal quantum states suffice, and a practical interferometric realization using low-intensity coherent light pulses is described.
Quantum key distribution over distances as long as 30 km.
- Computer Science, MathematicsOptics letters
- 1995
Low error rates were obtained for the quantum transmissions, and error-free secret keys were distilled from the raw data by use of secure error-correction and privacy-amplification protocols.
Practical quantum cryptography based on two-photon interferometry.
- Physics, MathematicsPhysical review letters
- 1992
The experimental setup consists of an external source of correlated photon pairs which propagate to two widely separated unbalanced Mach-Zehnder interferometers and can be fully modulated by phase plates in either interferometer.
FREE-SPACE QUANTUM-KEY DISTRIBUTION
- Physics
- 1998
Nonproliferation and International Security,Los Alamos, NM 87545(February 1, 2008)A working free-space quantum key distribution (QKD)system has been developed and tested over a 205-m indooroptical…
Quantum Key Distribution and String Oblivious Transfer in Noisy Channels
- Computer Science, MathematicsCRYPTO
- 1996
A lemma is proved that extends a security proof given by Yao for a (one bit) QOT protocol to this String-QOT protocol, which implies the unconditional security of the QKD protocol despite the previous proof that unconditionally secure bit commitment schemes are impossible.