Experimental Guesswork with Quantum Side Information Using Twisted Light

Guesswork is an information-theoretic quantity which can be seen as an alternate security criterion to entropy. Recent work has established the theoretical framework for guesswork in the presence of quantum side information, which we extend both theoretically and experimentally. We consider guesswor...

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Bibliographic Details
Published inSensors (Basel, Switzerland) Vol. 23; no. 14; p. 6570
Main Authors Katariya, Vishal, Bhusal, Narayan, You, Chenglong
Format Journal Article
LanguageEnglish
Published Switzerland MDPI AG 21.07.2023
MDPI
Subjects
Cryptography
Entropy
Light
Probability
quantum cryptography
quantum information
quantum optics
Random variables
quantum information
quantum cryptography
quantum optics
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Summary:Guesswork is an information-theoretic quantity which can be seen as an alternate security criterion to entropy. Recent work has established the theoretical framework for guesswork in the presence of quantum side information, which we extend both theoretically and experimentally. We consider guesswork when the side information consists of the BB84 states and their higher-dimensional generalizations. With this side information, we compute the guesswork for two different scenarios for each dimension. We then performed a proof-of-principle experiment using Laguerre-Gauss modes to experimentally compute the guesswork for higher-dimensional generalizations of the BB84 states. We find that our experimental results agree closely with our theoretical predictions. This work shows that guesswork can be a viable security criterion in cryptographic tasks and is experimentally accessible in a number of optical setups.
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content type line 23
USDOE
SC0021069
ISSN:1424-8220
1424-8220
DOI:10.3390/s23146570