WDM-Compatible Channel Scrambling for Secure High-Data-Rate Optical Transmissions

Cornejo, Joaquin; Perez, C.E.; Tocnaye, J.-L. de la

doi:10.1109/jlt.2007.901329

Cited by 20 publications

(7 citation statements)

References 16 publications

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“…A simple way to achieve it is by means of conventional existing optical elements (this architecture is mainly used for ultrashort pulse OCDMA [7,8], or __ J /e35% pulse shaping), i.e. using a highly dispersive diffraction grating, in a 4-f set-up (symmetrical set-up is used for decoding) providing a 1-D dispersion of input-signal spectral information.…”

Section: Time-frequency Scrambling Approachmentioning

confidence: 99%

“…Then, the mask transmission becomes the critical parameter of the encryption technique. The key transmission may be carry out by classical way with POCS algorithm [8] or using quantum key distribution (QKD) [15].…”

Section: Potential Attack Based On Spectral Phase Measurementmentioning

confidence: 99%

“…Various techniques have been proposed, such as quantum [4], chaos [5] and polarization [6] encryptions. Our approach belongs to single user OCDMA, and is a spectrum phase encoding approach [7,8], to scramble and spread the incident pulses over a longer duration than the input data period (Tb), i.e. Tc > Tb, where Tc is the duration of the spread pulse.…”

Section: Introductionmentioning

confidence: 99%

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Non-invasive WDM channel scrambling for secure high data rate optical transmissions

Cornejo¹,

Tocnaye²

2008

SPIE Proceedings

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This paper proposes a non-invasive optical scrambling technique to secure optical transmissions at high data rates (>10Gb/s). The proposed method belongs to the optical code-division multiple access (OCDMA) technique, using spectral phase encoding, based on overlapping of adjacent scrambled/spread pulses to encrypt transmitted data. In our system, data confidentiality is directly related to scrambled/spread pulse interference, avoiding direct detection by a power detector, in contrast to network access application (OCDMA), where this overlapping should be avoided. Our goal is to secure data transmission without impacting the physical layer, by guaranteeing the optical transparency of the encryption technique with respect to conventional transmission equipments. Therefore, we simulated the system penalty as a function of the transmission distance for a bit error rate (BER) target of 10-9 to estimate the impact of the linear and non-linear transmission effects on our encryption technique. We consider a point-to-point span for mono-channel and multi-channel setups where self-phase modulation (SPM) and cross-phase modulation (XPM) become significant. In the last section, we discuss the resilience of our encryption technique to some realistic attack scenarios. The eavesdropper can use the linear optical sampling (LOS) technique, which with coherence conditions on the waveform under test, permits to extract the amplitude and the phase of each spectral compound, enabling, to determinate the phase filter used to encrypt. Determining the necessary time to crack the mask allows us to establish the mask refreshment to guarantee data confidentiality.

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Section: Time-frequency Scrambling Approachmentioning

confidence: 99%

Section: Potential Attack Based On Spectral Phase Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Non-invasive WDM channel scrambling for secure high data rate optical transmissions

Cornejo¹,

Tocnaye²

2008

SPIE Proceedings

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“…We remark that this encoding scheme is a coherent spectral phase encoded timespreading technique and it is vulnerable with respect to the use of differential phase shift keying (DPSK) demodulator or an optical spectral analyzer, due to the presence of dips in the spectrum of the encoded data [5]. Different approaches can be used to overcome these impairments, as increasing the number of phases [6] or using a phase masking technique [10]. Using a device with N ports, and phase shifters that can assume only two values, the number of the optical codes (secret keys) is K=2 N .…”

Section: Bit-cipheringmentioning

confidence: 99%

Secure optical bit- and block-cipher transmission using a single multiport encoder/decoder

Cincotti

Wada

Kitayama

2008

OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference

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“…This strategy encompasses the physical encryption of signals in the optical layer. In fact, several recent proposals approach this subject by utilizing hybrid electro-optical schemes [3], nonlinear effects [4], and spectral phase-encoding (SPE) [5].…”

Section: Introductionmentioning

confidence: 99%

A new all-optical cryptography technique applied to WDM-compatible DPSK signals

Abbade

Messani

Alves

et al. 2013

2013 15th International Conference on Transparent Optical Networks (ICTON)

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We investigate the application of a new all-optical cryptography technique to wavelength division multiplexing (WDM)-compatible differential phase-shift keying (DPSK) signals. The technique uses current optical band-pass optical filters with narrow bandwidths to divide a given input WDM-compatible signal into several spectral slices, which are submitted to two cryptographic key stages. The first one impresses amplitude encoding, whereas the second imposes delay variations to each spectral slice. The technique performance is assessed by evaluating the encrypted and decrypted signals bit error rates. Computer simulations suggest that encrypted DPSK signals may be properly recovered even after being propagated through typical metropolitan area network distances. 1

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WDM-Compatible Channel Scrambling for Secure High-Data-Rate Optical Transmissions

Cited by 20 publications

References 16 publications

Non-invasive WDM channel scrambling for secure high data rate optical transmissions

Non-invasive WDM channel scrambling for secure high data rate optical transmissions

Secure optical bit- and block-cipher transmission using a single multiport encoder/decoder

A new all-optical cryptography technique applied to WDM-compatible DPSK signals

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