A quantum Diffie-Hellman protocol

Pranav Subramaniam, Abhishek Parakh

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


In this paper, a quantum version of Diffie-Hellman key agreement protocol is developed using the commutative rotation transformations. Qubits rotated by secret rotation angles and exchanged over a quantum channel are appropriately measured to form a secret shared key. Additional 'slack' rotations are used to ensure that measurement of the commutative transformations always result in the same bit value, for legitimate party, in the absence of an eavesdropper. The performance of the quantum protocol is evaluated in terms of the number of exchanges needed for a given key size and the probability of detecting an eavesdropper. We also compare the proposed protocol with BB84.

Original languageEnglish (US)
Pages (from-to)213-223
Number of pages11
JournalInternational Journal of Security and Networks
Issue number4
StatePublished - 2016


  • Key exchange algorithm
  • Perfect secrecy
  • Quantum Diffie-Hellman

ASJC Scopus subject areas

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

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