Improving efficiency of quantum key distribution with probabilistic measurements

Abhishek Parakh, Pramode Verma, Mahadevan Subramaniam

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The first part of this paper presents two efficient cryptographic protocols, based on quantum entanglement, for secure exchange of secret keys. While the first protocol requires storage of entangled qubits, the second protocol has no storage requirements and presents a probabilistic model. We show that there is a tradeoff between security against eavesdropping and the efficiency of the protocol in terms of usable bits available for the secret key. This security parameter s can be varied by the communicating parties based on practical considerations. In the second part of the paper, we apply the probabilistic model to BB84 and show how it can be used to improve the efficiency of BB84.

Original languageEnglish (US)
Pages (from-to)37-47
Number of pages11
JournalInternational Journal of Security and Networks
Issue number1-2
StatePublished - 2016


  • Efficiency improvement
  • Probabilistic model for QKD
  • Quantum key distribution

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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