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Abstract
We sketch a relation between two crucial, yet independent, fields in quantum information research, viz. quantum decoherence and quantum cryptography. We investigate here how the standard cryptographic assumption of shielded laboratory, stating that data generated by a secure quantum device remain private unless explicitly published, is disturbed by the einselection mechanism of quantum Darwinism explaining the measurement process by interaction with the external environment. We illustrate the idea with a paradigmatic example of a quantum random number generator compromised by a quantum analog of the Van Eck phreaking. In particular, we derive a trade-off relation between the eavesdropper's guessing probability $\mathrm{P}_{\mathrm{guess}}$ and the collective decoherence factor Γ of the simple form $\mathrm{P}_{\mathrm{guess}} + \Gamma \geqslant 1$.
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Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1088/1367-2630/aca558
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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NEW JOURNAL OF PHYSICS
no. 24,
ISSN: 1367-2630 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Mironowicz P.: Quantum security and theory of decoherence// NEW JOURNAL OF PHYSICS -,iss. 24 (2022), s.113054-
- DOI:
- Digital Object Identifier (open in new tab) 10.1088/1367-2630/aca558
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
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