A Total Secrecy Coding Scheme with True Random Sequences for Remote Estimation Against Eavesdroppers with Anti-Coding Mechanisms

In this paper, we consider the design issue of a total secrecy coding scheme on remote estimation against eavesdroppers with anti-coding mechanisms. To be more specific, a legitimate user estimates the system state based on the innovation from anchor sensors and vulnerable ones via the wireless network. Vulnerable sensors may be under eavesdropping attacks, and the data of vulnerable sensors is generally protected by a coding scheme. An illegal user aims to obtain the state utilizing a filter, and such filters combined with an anti-coding mechanism execute the update procedure using the innovation yielded by its own sensor and the one from vulnerable sensors the user eavesdrops on. To resist such illegal entities, we design a total secrecy coding scheme with true random sequences. Compared with the existing results, this scheme can reduce the cost and is difficult for attackers to infer encryption patterns. The analytical policy of the total secrecy coding scheme in scalar systems is obtained. Finally, we use a simulation to verify the effectiveness of the obtained results.