Measurement-device-independent quantum digital signatures

Ittop Puthoor, Ryan Amiri, Petros Wallden, Marcos Curty, Anna Erika Elisabeth Andersson

Research output: Contribution to journalArticle

20 Citations (Scopus)
45 Downloads (Pure)

Abstract

Digital signatures play an important role in software distribution, modern communication, and financial transactions, where it is important to detect forgery and tampering. Signatures are a cryptographic technique for validating the authenticity and integrity of messages, software, or digital documents. The security of currently used classical schemes relies on computational assumptions. Quantum digital signatures (QDS), on the other hand, provide information-theoretic security based on the laws of quantum physics. Recent work on QDS Amiri et al., Phys. Rev. A 93, 032325 (2016); Yin, Fu, and Zeng-Bing, Phys. Rev. A 93, 032316 (2016) shows that such schemes do not require trusted quantum channels and are unconditionally secure against general coherent attacks. However, in practical QDS, just as in quantum key distribution (QKD), the detectors can be subjected to side-channel attacks, which can make the actual implementations insecure. Motivated by the idea of measurement-device-independent quantum key distribution (MDI-QKD), we present a measurement-device-independent QDS (MDI-QDS) scheme, which is secure against all detector side-channel attacks. Based on the rapid development of practical MDI-QKD, our MDI-QDS protocol could also be experimentally implemented, since it requires a similar experimental setup.

Original languageEnglish
Article number022328
Number of pages11
JournalPhysical Review A
Volume94
Issue number2
DOIs
Publication statusPublished - 23 Aug 2016

Keywords

  • FINITE-KEY ANALYSIS
  • PROBABILITY-INEQUALITIES
  • CRYPTOGRAPHY
  • SYSTEM
  • CRYPTOSYSTEMS

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