Journal
PLOS ONE
Volume 15, Issue 8, Pages -Publisher
PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0236630
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Categories
Funding
- Junta de Castilla y Leon [VA296P18, VA089U16]
- MINECO/FEDER, UE [TEC2015-69665-R]
- Movilidad Investigadores UVa-Banco Santander 2015
- Industry Canada
- CFI
- NSERC
- NSERC (program CryptoWorks21)
- Ontario MRI
- US Office of Naval Research
- Ministry of Education and Science of Russia (program NTI center for quantum communications)
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Quantum cryptography promises security based on the laws of physics with proofs of security against attackers of unlimited computational power. However, deviations from the original assumptions allow quantum hackers to compromise the system. We present a side channel attack that takes advantage of ventilation holes in optical devices to inject additional photons that can leak information about the secret key. We experimentally demonstrate light injection on an ID Quantique Clavis2 quantum key distribution platform and show that this may help an attacker to learn information about the secret key. We then apply the same technique to a prototype quantum random number generator and show that its output is biased by injected light. This shows that light injection is a potential security risk that should be addressed during the design of quantum information processing devices.
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