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Questions tagged [quantum-cryptography]

Quantum cryptography describes the use of quantum mechanical effects to perform cryptographic tasks. This is not to be confused with quantum computing or cryptanalysis techniques such as Shor's algorithm.

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Post quantum zkSNARK?

Do there exist any zkSNARK constructions that are based on post quantum cryptography? The encryption scheme used in the zkSNARK that is employed in Zcash for instance uses an encryption scheme of the ...
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Using XL Algorithm to solve overdetermined systems, simple example required

Can someone give a small example of how the XL algorithm is used to solve an overdetermined system, with numbers and variables along with the steps if possible as apposed to just a general case? This ...
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Is ekert91 more secure than BB84?

I'm studying quantum cryptography and my question is "simple": Is the use of entangled states, like in the Ekert91 protocol, more secure than using not-entangled states like the BB84's ones? Is ...
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Clarification on the state of the art of qubit commitment

What is the current state of research on quibit commitment? It seems that the answer is not 2001 but it seems to me that a lot of these pdf are referring to a old protocols of quantum bit commitment ...
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Are biases narrowed towards the provenance of hard NP complete problems relevant?

I hear of randomized reduction, deterministic reduction and non-deterministic reduction of complexity from A to B problems. This could make things impossible for polynomial time adversary prying into ...
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Can quantum money exist?

Can a quantum money system exist in which bank (who possesses a secret key $k$) can create quantum states $S$ that anyone (in possession of public key $P$) can verify was issued by the bank without ...
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Differences between Single photon QKD system (BB84) and EPR photon-pair QKD system (BBM92) for quantum public key distribution?

What are some differences between Single photon QKD system (BB84) and EPR photon-pair QKD system (BBM92) for quantum public key distribution?
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Quantum key distribution

Is there a minimum limit for No. of photons that Alice would send to Bob in a QKD scheme like BB84? If not than what would be a desirable length for initial qubit string?