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The purpose of this paper is to find an optimal attack strategy that maximizes the output error of the attacked system with low energy consumption. Based on a general model of linear time-invariant systems and a key technical lemma, a new optimal attack strategy for the meticulously designed false data injection attack is constructed. It is worth mentioning that compared with the existing model-based attack strategies, the designed one is more general and the corresponding attack strategy is more easily implemented when system states and external input are inaccessible. Key to overcoming the inaccessible information, a dynamic observer in the form of Luenberger is constructed. Finally, a networked magnetic levitation steel ball movement system is applied to illustrate the effectiveness of the proposed scheme.<\/jats:p>","DOI":"10.1051\/sands\/2022005","type":"journal-article","created":{"date-parts":[[2022,7,25]],"date-time":"2022-07-25T07:55:45Z","timestamp":1658735745000},"page":"2022005","source":"Crossref","is-referenced-by-count":2,"title":["Optimal injection attack strategy for cyber-physical systems: a dynamic feedback approach"],"prefix":"10.1051","volume":"1","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3694-0021","authenticated-orcid":false,"given":"Sheng","family":"Gao","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4527-9610","authenticated-orcid":false,"given":"Hao","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0334-4082","authenticated-orcid":false,"given":"Zhuping","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6951-8137","authenticated-orcid":false,"given":"Chao","family":"Huang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"250","published-online":{"date-parts":[[2022,7,22]]},"reference":[{"key":"R1","doi-asserted-by":"crossref","first-page":"88","DOI":"10.1109\/MC.2009.81","volume":"42","author":"Wolf","year":"2009","journal-title":"Computer"},{"key":"R2","doi-asserted-by":"crossref","first-page":"1802","DOI":"10.1109\/JIOT.2017.2703172","volume":"4","author":"Humayed","year":"2017","journal-title":"IEEE Internet Things J"},{"key":"R3","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1016\/j.cose.2017.04.005","volume":"68","author":"Ashibani","year":"2017","journal-title":"Comput Secur"},{"key":"R4","doi-asserted-by":"crossref","unstructured":"Weir M, Aggarwal S and Medeiros BD et al. 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