Semi-quantum Key Distribution Robust Against Combined Collective Noise

Chih Lun Tsai, Tzonelih Hwang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


This paper first proposes a new coding function for the six-qubit decoherence-free states that can resist both types of collective noise (i.e., dephasing and rotation noise) simultaneously. Subsequently, based on the coding function, a semi-quantum key distribution (SQKD) protocol is designed such that a sender with strong quantum capabilities can send a key to a classical receiver who can merely perform classical operations. This is the first SQKD protocol that can resist the combined collective noise. Analyses show that this protocol is secure and effective.

Original languageEnglish
Pages (from-to)3410-3418
Number of pages9
JournalInternational Journal of Theoretical Physics
Issue number11
Publication statusPublished - 2018 Nov 1

All Science Journal Classification (ASJC) codes

  • Mathematics(all)
  • Physics and Astronomy (miscellaneous)


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