Secure optical fiber transmission via ghost imaging

In this paper we present a novel optical encryption method which can be used to encrypt image (video) information over optical fibers. Through ghost imaging, the proposed method can capture real-time imagery using only a photodiode and random binary illumination patterns. The underlying optical encryption is based on phase modulation of binary patterns used for image reconstruction. By passing intensity values down the communication channel and having knowledge about the pattern keys, the proposed scheme can achieve high level security against unauthorized access. The experimental results validate the efficient performance of our scheme which achieves high security, robustness, and efficiency when passing data over long distances.