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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 26,
  • Issue 13,
  • pp. 1798-1806
  • (2008)

Secure OCDM Transmission Using a Planar Multiport Encoder/Decoder

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Abstract

We present different optical secure point-to-point transmission schemes using a planar multiport encoder/decoder. We consider both bit- and block-cipher cryptography: in the first case, each bit (both mark and space) from each user is encoded in a two-key optical code-division multiplexing signal. Block-cipher cryptography encodes a stream of <i>N</i> bits into a single code and corresponds to optical <i>M</i>-ary transmission. We demonstrate that block-ciphers are more secure with respect to bit-ciphers schemes and also against known-plaintext and chosen-plaintext attacks.

© 2008 IEEE

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