Joint QKD-Post-Quantum Cryptosystems

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8 Scopus citations


To extend the transmission distance and/or improve secret-key rate of QKD protocols, we propose to employ the joint QKD-post-quantum cryptosystems in which QKD is used for raw-key transmission while the post-quantum cryptography (PQC) subsystem to transmit parity bits for information reconciliation. We also describe a run-Time configurable spatially coupled (SC)-LDPC code, derived from template quasi cyclic (QC)-LDPC, suitable for use in both information reconciliation and McEliece crypto-subsystem. For twin-field (TF)-QKD subsystem, the proposed joint cryptosystem, which takes the complexity of algorithm used to break the PQC subsystem into account, is able to achieve record distance of 1238 km over ultra-low-loss fiber.

Original languageEnglish (US)
Article number9174728
Pages (from-to)154708-154712
Number of pages5
JournalIEEE Access
StatePublished - 2020


  • McEliece cryptosystem
  • Quantum communication
  • discrete variable (DV)-QKD
  • information reconciliation
  • post-quantum cryptography
  • quantum key distribution (QKD)
  • secret-key rate (SKR)

ASJC Scopus subject areas

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)


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