Mediated semi-quantum key distribution with improved efficiency

@article{Guskind2022MediatedSK,
  title={Mediated semi-quantum key distribution with improved efficiency},
  author={Julia Guskind and Walter O. Krawec},
  journal={Quantum Science \& Technology},
  year={2022},
  volume={7}
}
Mediated semi-quantum key distribution involves the use of two end-users who have very restricted, almost classical, capabilities, who wish to establish a shared secret key using the help of a fully-quantum server who may be adversarial. In this paper, we introduce a new mediated semi-quantum key distribution protocol, extending prior work, which has asymptotically perfect efficiency. Though this comes at the cost of decreased noise tolerance, our protocol is backwards compatible with prior… 

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References

SHOWING 1-10 OF 53 REFERENCES

Mediated semiquantum key distribution

TLDR
This paper designs a new quantum key distribution protocol, allowing two limited semi-quantum or "classical" users to establish a shared secret key with the help of a fully quantum server and proves the unconditional security of this protocol even in the worst case: when this quantum server is an all-powerful adversary.

An improved asymptotic key rate bound for a mediated semi-quantum key distribution protocol

TLDR
This paper reconsiders a mediated SQKD protocol and derive a new proof of unconditional security for it, and derives a new lower bound on its key rate in the asymptotic scenario, showing that the protocol in question can tolerate higher rates of error than previously thought.

Multi-Mediated Semi-Quantum Key Distribution

  • Walter O. Krawec
  • Computer Science, Mathematics
    2019 IEEE Globecom Workshops (GC Wkshps)
  • 2019
TLDR
This work constructs a new protocol in this model and shows how it can withstand high levels of quantum noise, though at a cost to efficiency, and proves a general security result applicable to arbitrary MM-SQKD protocols.

Semi-device-independent quantum key distribution based on a coherence equality

TLDR
The first example of a semi-device-independent quantum key distribution (SDIQKD) protocol with a classical Alice and Bob is introduced, showing the protocol to be semi- device-independent since the only trusted operations occur in the users’ labs, and establishing security against an adversary with bounded quantum memory.

Efficient mediated semi-quantum key distribution

High-Dimensional Semiquantum Cryptography

TLDR
It is shown that, similar to the fully quantum key distribution case, high-dimensional systems can increase the noise tolerance in the semiquantum case and several general security results are proved which are applicable to other (S)QKD protocols (both high- dimensional ones and standard qubit-based protocols) utilizing a two-way quantum channel.

Practical security of semi-quantum key distribution

TLDR
A new SQKD protocol is devised and its security against certain practical attacks is analyzed, proving it to be secure in the perfect qubit scenario.

Fault-tolerant Semiquantum key Distribution Over a Collective-dephasing Noise Channel

TLDR
Two fault-tolerant SQKKD protocols are proposed, the randomization-based SQKD protocol and the measure-resend SQKd protocol, which are robust against the collective-dephasing noise.

Three Attacks on the Mediated Semi‐Quantum Key Distribution without Invoking Quantum Measurement

Semi‐quantum key distribution is a very interesting new branch of quantum key distribution. It can be implemented when one or more participants are restricted to operate quantum states only on the

The security of practical quantum key distribution

TLDR
Essential theoretical tools that have been developed to assess the security of the main experimental platforms are presented (discrete- variable, continuous-variable, and distributed-phase-reference protocols).
...