Quantum-noise - Protected data encryption for WDM fiber-optic networks

Eric Corndorf*, Chuang Liang, Gregory S. Kanter, Prem Kumar, Horace P. Yuen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We demonstrate high data-rate quantum-noise - protected data encryption through optical fibers using coherent states of light. Specifically, we demonstrate 650Mbps data encryption through a 10Gbps data-bearing, in-line amplified 200km-long line. In our protocol, legitimate users (who share a short secret-key) communicate using an M-ry signal set while an attacker (who does not share the secret-key) is forced to contend with the fundamental and irreducible quantum-measurement noise of coherent states. Implementations of our protocol using both polarization-encoded signal sets as well as polarization-insensitive phase-keyed signal sets are experimentally and theoretically evaluated. Different from the performance criteria of the cryptographic objective of key generation (quantum key generation), the performance criteria of data encryption are established and carefully considered.

Original languageEnglish (US)
Pages (from-to)21-30
Number of pages10
JournalComputer Communication Review
Issue number5
StatePublished - Oct 1 2004


  • Data encryption
  • Quantum cryptography

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications


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