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Studies on secure M-ary optical code division multiplexing using a single multi-port encoder/decoder

崇宏 小玉

Published Jan 1, 2012• 0 citations
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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 ofnbits into a single code and corresponds to opticalM-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.