Experimental investigation on security of temporal phase coding OCDMA system with code-shift keying and differential phase-shift keying

Bo Dai, Zhensen Gao, Xu Wang, Nobuyuki Kataoka, Naoya Wada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


We experimentally demonstrate the security vulnerability in the temporal phase coding single-user differential phase-shift keying (DPSK) and code-shift keying (CSK) OCDMA systems with a DPSK demodulator. In the experiment, we build up the 2.5Gbit/s DPSK- and CSK-OCDMA systems. In the systems, we use two 31-chip 640 Gchip/s superstructured fiber Bragg grating encoders for the signal encoding. In the receiving side, we remove the decoders and utilize the DPSK demodulator to detect the encoded signals directly. We successfully achieve the error-free BER performance and obtaine the clear open eye diagrams using the detection without the proper decoding. It indicates the existence of the eavesdropping vulnerability in the both systems. Furthermore, we also discuss the principle of DPSK demodulation attack.

Original languageEnglish
Title of host publicationOptical Transmission Systems, Switching, and Subsystems VIII
EditorsYikai Su, Ernesto Ciaramella, Xiang Liu, Naoya Wada
Number of pages6
ISBN (Print)978-0819485564
Publication statusPublished - 2011
EventConference on Optical Transmission Systems, Switching, and Subsystems VIII - Shanghai, China
Duration: 8 Dec 201012 Dec 2010

Publication series

NameProceedings of SPIE
ISSN (Print)1996-756X


ConferenceConference on Optical Transmission Systems, Switching, and Subsystems VIII

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