DSP-Based Physical Layer Security for Coherent Optical Communication Systems
A novel digital signal processing (DSP)-based scheme for physical layer security in coherent optical communication systems is proposed and numerically investigated. The optical layer signal encryption is accomplished by two dispersive elements and one phase modulator (PM) driven by a DSP-generated e...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2022-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9869299/ |
| _version_ | 1811211408865492992 |
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| author | Jiaxiang He Roger Giddings Wei Jin Jianming Tang |
| author_facet | Jiaxiang He Roger Giddings Wei Jin Jianming Tang |
| author_sort | Jiaxiang He |
| collection | DOAJ |
| description | A novel digital signal processing (DSP)-based scheme for physical layer security in coherent optical communication systems is proposed and numerically investigated. The optical layer signal encryption is accomplished by two dispersive elements and one phase modulator (PM) driven by a DSP-generated encryption key, whilst signal decryption uses similar components but with inverted dispersion values and security keys. A critical aspect of the DSP-based physical layer security is that the security keys, driving the PMs to hide/recover the data signals, must be highly unpredictable and noise-like, thus orthogonal frequency division multiplexing (OFDM) signals are employed as they possess these characteristics, they can also be easily generated and cover a suitably wide range of unique keys. Numerical simulations are conducted to determine optimum system parameters for achieving a high level of security, the key parameters requiring optimization are the dispersion of the dispersive elements and the bandwidth of the security keys. Using these determined optimum parameters, in-depth investigations are undertaken of encryption/decryption induced transmission performance penalties, sensitives to various parameter offsets and operation over various transmission distances. To observe any data signal dependencies, various performance metrics are investigated for different combinations of modulation formats (DQPSK and 16QAM) and baud rates (40 Gbaud and 100 Gbaud) for the transmitted data signals. The proposed DSP-based physical layer security scheme is shown to have the potential to achieve, in a low-cost and highly effective manner, a high level of physical layer security with acceptable performance penalties for existing coherent optical communication systems. |
| first_indexed | 2024-04-12T05:13:51Z |
| format | Article |
| id | doaj.art-6a8a3f6006254c04b4dad730d83f8c89 |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-04-12T05:13:51Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-6a8a3f6006254c04b4dad730d83f8c892022-12-22T03:46:42ZengIEEEIEEE Photonics Journal1943-06552022-01-0114511110.1109/JPHOT.2022.32024339869299DSP-Based Physical Layer Security for Coherent Optical Communication SystemsJiaxiang He0Roger Giddings1https://orcid.org/0000-0002-2111-5830Wei Jin2https://orcid.org/0000-0002-6913-8265Jianming Tang3https://orcid.org/0000-0001-6453-5862School of Computer Science and Electronic Engineering, Bangor University, Bangor, U.K.School of Computer Science and Electronic Engineering, Bangor University, Bangor, U.K.School of Computer Science and Electronic Engineering, Bangor University, Bangor, U.K.School of Computer Science and Electronic Engineering, Bangor University, Bangor, U.K.A novel digital signal processing (DSP)-based scheme for physical layer security in coherent optical communication systems is proposed and numerically investigated. The optical layer signal encryption is accomplished by two dispersive elements and one phase modulator (PM) driven by a DSP-generated encryption key, whilst signal decryption uses similar components but with inverted dispersion values and security keys. A critical aspect of the DSP-based physical layer security is that the security keys, driving the PMs to hide/recover the data signals, must be highly unpredictable and noise-like, thus orthogonal frequency division multiplexing (OFDM) signals are employed as they possess these characteristics, they can also be easily generated and cover a suitably wide range of unique keys. Numerical simulations are conducted to determine optimum system parameters for achieving a high level of security, the key parameters requiring optimization are the dispersion of the dispersive elements and the bandwidth of the security keys. Using these determined optimum parameters, in-depth investigations are undertaken of encryption/decryption induced transmission performance penalties, sensitives to various parameter offsets and operation over various transmission distances. To observe any data signal dependencies, various performance metrics are investigated for different combinations of modulation formats (DQPSK and 16QAM) and baud rates (40 Gbaud and 100 Gbaud) for the transmitted data signals. The proposed DSP-based physical layer security scheme is shown to have the potential to achieve, in a low-cost and highly effective manner, a high level of physical layer security with acceptable performance penalties for existing coherent optical communication systems.https://ieeexplore.ieee.org/document/9869299/Secure optical communicationsoptical layer encryptioncoherent optical communications |
| spellingShingle | Jiaxiang He Roger Giddings Wei Jin Jianming Tang DSP-Based Physical Layer Security for Coherent Optical Communication Systems IEEE Photonics Journal Secure optical communications optical layer encryption coherent optical communications |
| title | DSP-Based Physical Layer Security for Coherent Optical Communication Systems |
| title_full | DSP-Based Physical Layer Security for Coherent Optical Communication Systems |
| title_fullStr | DSP-Based Physical Layer Security for Coherent Optical Communication Systems |
| title_full_unstemmed | DSP-Based Physical Layer Security for Coherent Optical Communication Systems |
| title_short | DSP-Based Physical Layer Security for Coherent Optical Communication Systems |
| title_sort | dsp based physical layer security for coherent optical communication systems |
| topic | Secure optical communications optical layer encryption coherent optical communications |
| url | https://ieeexplore.ieee.org/document/9869299/ |
| work_keys_str_mv | AT jiaxianghe dspbasedphysicallayersecurityforcoherentopticalcommunicationsystems AT rogergiddings dspbasedphysicallayersecurityforcoherentopticalcommunicationsystems AT weijin dspbasedphysicallayersecurityforcoherentopticalcommunicationsystems AT jianmingtang dspbasedphysicallayersecurityforcoherentopticalcommunicationsystems |