A dual dynamic key chaotic encryption system for industrial cyber-physical systems

Abstract

Industrial Cyber-Physical Systems (ICPS) have higher requirements on the data encryption rate and security performance; meanwhile, the devices in ICPS only support the communication protocols in the lower layers, such as the physical layer and data link layer. However, the existing encryption systems are mostly developed on the application layer and not suitable for the ICPS. Moreover, the other encryption systems, equipped the security function on the link layer, update the keys periodically, and can not satisfy the high-security requirements of ICPS. Therefore, taking the high parallel property of FPGA (Field Programmable Gate Array) into consideration, this letter proposes a Dual Dynamic key chaotic Encryption System (D²ES) for ICPS, which provides the dynamics on the key generation and key update cycle on the data link layer. The system mainly includes an encryption module and a dual dynamic key module to realize the high-security performance. Finally, the proposed D²ES is implemented on FPGA platform, and extensive experiments have been conducted to evaluate its security performance. The experimental results show our D²ES provides more efficient encryption compared with the popular encryption algorithm DES (Data Encryption Standard) and can be applied for ICPS.