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Título: | Secret key exchange in ultralong lasers by radiofrequency spectrum coding |
Autor: | Tonello, A.; Barthélémy, A.; Krupa, K. CSIC; Kermène, V.; Desfarges-Berthelemot, Agnès; Shalaby, B.M.; Boscolo, S.; Turitsyn, S.K.; Ania Castañón, Juan Diego CSIC ORCID | Palabras clave: | Fiber optics communications Optical security and encryption Fiber lasers |
Fecha de publicación: | 24-abr-2015 | Editor: | Nature Publishing Group | Citación: | Light: Science and Applications 4: e276 (2015) | Resumen: | We propose a new approach to the generation of an alphabet for secret key exchange relying on small variations in the cavity length of an ultralong fiber laser. This new concept is supported by experimental results showing how the radiofrequency spectrum of the laser can be exploited as a carrier to exchange information. The test bench for our proof of principle is a 50-km-long fiber laser linking two users, Alice and Bob, where each user can randomly add an extra 1-km-long segment of fiber. The choice of laser length is driven by two independent random binary values, which makes such length become itself a random variable. The security of key exchange is ensured whenever the two independent random choices lead to the same laser length and, hence, to the same free spectral range. | Descripción: | 5 págs,; 4 figs.; Open Access funded by Creative Commons Atribution Licence 3.0 | Versión del editor: | http://dx.doi.org/10.1038/lsa.2015.49 | URI: | http://hdl.handle.net/10261/134877 | DOI: | 10.1038/lsa.2015.49 | Identificadores: | doi: 10.1038/lsa.2015.49 issn: 2047-7538 |
Aparece en las colecciones: | (CFMAC-IO) Artículos |
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Secret.pdf | 1,46 MB | Adobe PDF | Visualizar/Abrir |
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