Physical Layer Encryption for Industrial Ethernet in Gigabit Optical Links

• URL: http://arxiv.org/abs/2401.15038v1
• Date: Fri, 26 Jan 2024 18:01:59 GMT
• Title: Physical Layer Encryption for Industrial Ethernet in Gigabit Optical Links
• Authors: Adrián Pérez-Resa, Miguel García-Bosque, Carlos Sánchez-Azqueta, Santiago Celma,
• Abstract summary: New encryption method for high speed optical communications suitable for such kind of networks is proposed. New encryption method consists of a symmetric streaming encryption of the 8b/10b data flow at PCS (Physical Coding Sublayer) level.
• Score: 0.5624791703748108
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Industrial Ethernet is a technology widely spread in factory floors and critical infrastructures where a high amount of data need to be collected and transported. Fiber optic networks at gigabit rates fit well with that type of environments where speed, system performance and reliability are critical. In this work a new encryption method for high speed optical communications suitable for such kind of networks is proposed. This new encryption method consists of a symmetric streaming encryption of the 8b/10b data flow at PCS (Physical Coding Sublayer) level. It is carried out thanks to an FPE (Format Preserving Encryption) blockcipher working in CTR (Counter) mode. The overall system has been simulated and implemented in an FPGA (Field Programmable Gate Array). Thanks to experimental results it can be concluded that it is possible to cipher traffic at this physical level in a secure way. In addition, no overhead is introduced during encryption, getting minimum latency and maximum throughput.

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