Physical Layer Security of Multimode Optical Fiber Transmission Systems
Optical networks are the backbone of our information and communication society. The data traffic includes not only user data but also mission critical communication services, which are sensitive to eavesdropping and jam-ming attacks. This project studies the fundamental limits of physical layer security for data transmission through optical multimode fibers (MMF). In contrast to cryptographic security whose security is derived from the com-putational complexity of a cryptographic algorithm, in our project we are looking at the information theoretic security of the system, which guaran-tees secrecy regardless of the computation power available at the eaves-dropper. Hence, this project concentrates on the fundamental limits of the secure goodput of MMFs between two legitimate nodes. Experiments will be conducted at the Chair of Measurement and Sensor System Technique (MST) to determine the relationship between input and output modes of the MMF, i.e. the transmission matrix, to obtain reliable channel information, which will help the Communications Theory Chair (TNT) setting up and optimizing channel models, with the aim to maximize the confidelity of communication and prohibit that the eavesdropper gains any valuable knowledge of the transmitted data. To prohibit that the eaves-dropper gains any information of the channels during calibration, a public key method will be initially used. Finally, a demonstration of the feasibility of physical layer security using MIMO-SDM will be conducted.
Staff: S. Rothe, H. Radner, N. Koukourakis, J. Czarske
Period: 12/18 - 11/20
Partner: Technische Universität Dresden, Communications Theory Chair (TNT),
Prof. E. Jorswieck, M. Sc. A. Lonnstrom
Optical network. In this project together with our partner, the physical layer security for a single MMF connection between two network nodes is investigated.
J. Czarske, D. Haufe, N. Koukourakis, L. Büttner “Transmission of independent signals through a multimode fiber using digital optical phase conjugation”, Opt. Express 24(13), 15128-15136 (2016).
D. Haufe, N. Koukourakis, L. Büttner, J. Czarske, “Transmission of multiple signals through an optical fiber using wavefront shaping”, Journal of Visualized Experiments, e55407, doi:10.3791/55407, (2017)