Efficient quantum cryptography with coherent-state light in optical fibers at Gbps rates

Eric Corndorf*, Prem Kumar, Chuang Liang, Geraldo A. Barbosa, Horace P. Yuen

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


We demonstrate high-speed (0.25Gbps) data encryption over 50km of telecom fiber using coherent states of light. For the parameter values used in the experiment, the demonstration is secure against individual ciphertext-only eavesdropping attacks near the transmitter with ideal detection equipment. While other quantum cryptographic schemes require the use of fragile quantum states and ultra-sensitive detection equipment, our protocol is loss tolerant, uses off-the-shelf components, and is optically amplifiable.

Original languageEnglish (US)
Pages (from-to)310-319
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2004
EventQuantum Communications and Quantum Imaging - San Diego, CA, United States
Duration: Aug 6 2003Aug 8 2003


  • Data encryption
  • Quantum cryptography

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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