標題: Light Encryption Scheme Using Light-Emitting Diode and Camera Image Sensor
作者: Liu, Yang
Liang, Kevin
Chen, Hung-Yu
Wei, Liang-Yu
Hsu, Chin-Wei
Chow, Chi-Wai
Yeh, Chien-Hung
光電工程學系
Department of Photonics
關鍵字: Free space communication;optical communications;light-emitting diode (LED)
公開日期: 1-Feb-2016
摘要: Visible light communication (VLC) is regarded as relatively secure communication when compared with other wireless communications using radio frequency (RF). However, due to the visual nature, the VLC signals are still subject to eavesdropping when they are emitted by the light source. Here, we propose a light encryption scheme using devices having light-emitting diode (LED) and a camera image sensor, such as a mobile phone. The original visible signal sending from the lamp can be first received by the proposed light encrypter. The information can be encrypted and then emitted. The light encrypter acts as an encryption gateway for signals in optical domain. The rolling shutter effect of the complementary metal-oxide semiconductor (CMOS) camera in the mobile phone can be used. By demodulating the rolling shutter pattern, the data information can be obtained. We also propose and demonstrate using the Otsu thresholding scheme to define the data logic in the rolling shutter pattern. We show that the Otsu scheme is effective for estimating the bit error rate (BER). The optimum number of intervals (segmentations) and the process time of the Otsu method are also studied.
URI: http://dx.doi.org/10.1109/JPHOT.2016.2519287
http://hdl.handle.net/11536/147832
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2016.2519287
期刊: IEEE PHOTONICS JOURNAL
Volume: 8
Issue: 1
起始頁: 0
結束頁: 0
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