Secret key exchange in ultra-long lasers by radio-frequency spectrum coding
Data(s) |
24/04/2015
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Resumo |
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 ultra-long fiber laser. This new concept is supported by experimental results showing how the radio-frequency 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. |
Formato |
application/pdf |
Identificador |
http://eprints.aston.ac.uk/25349/1/Secret_key_exchange_in_ultra_long_lasers.pdf Tonello, Alessandro; Barthélémy, Alain; Krupa, Katarzyna; Kermène, Vincent; Desfarges-Berthelemot, Agnès; Shalaby, Badr Mohamed; Boscolo, Sonia; Turitsyn, Sergei K. and Ania-Castañón, Juan Diego (2015). Secret key exchange in ultra-long lasers by radio-frequency spectrum coding. Light, 4 (2), |
Relação |
http://eprints.aston.ac.uk/25349/ |
Tipo |
Article PeerReviewed |