Physical layer secret key generation for fiber-optical networks

Konstantin Kravtsov, Zhen Xing Wang, Wade Trappe, Paul R. Prucnal

Research output: Contribution to journalArticlepeer-review

75 Scopus citations


We propose and experimentally demonstrate a method for generating and sharing a secret key using phase fluctuations in fiber optical links. The obtained key can be readily used to support secure communication between the parties. The security of our approach is based on a fundamental asymmetry associated with the optical physical layer: the sophistication of tools needed by an eavesdropping adversary to subvert the key establishment is significantly greater and more costly than the complexity needed by the legitimate parties to implement the scheme. In this sense, the method is similar to the classical asymmetric algorithms (Diffie-Hellman, RSA, etc.)

Original languageEnglish (US)
Pages (from-to)23756-23771
Number of pages16
JournalOptics Express
Issue number20
StatePublished - Oct 7 2013

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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