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The input secret message is modulated in the chaotic dynamics by inclusion rather than being directly added to the chaotic signal on the transmission line. A single channel is used for transmission of the encrypted signal. At the receiver side, a step-by-step sliding mode fractional-order chaotic observer subject to unknown input is proposed as the response system to obtain robust synchronization between the emitter and the receiver. After chaos synchronization is achieved at the receiver side, an estimation of the state variables is obtained and the plaintext is recovered. Finite-time convergence of both state and unknown input estimation errors is established. The efficiency of this proposed secure communication scheme is illustrated by numerical simulations.<\/jats:p>","DOI":"10.1177\/0142331217729425","type":"journal-article","created":{"date-parts":[[2017,10,9]],"date-time":"2017-10-09T06:26:52Z","timestamp":1507530412000},"page":"3651-3664","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":26,"title":["Single channel secure communication scheme based on synchronization of fractional-order chaotic Chua\u2019s systems"],"prefix":"10.1177","volume":"40","author":[{"given":"Maamar","family":"Bettayeb","sequence":"first","affiliation":[{"name":"Department of Electrical & Computer Engineering, University of Sharjah, Center of Excellence Intelligent Systems (CEIES), King Abdulaziz University, Jeddah, Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ubaid Muhsen","family":"Al\u2013Saggaf","sequence":"additional","affiliation":[{"name":"Center of Excellence in Intelligent Engineering Systems (CEIES) King Abdulaziz University, Jeddah, Saudi Arabia, Electrical and Computer Engineering Department, King Abdulaziz University, Jeddah, Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Said","family":"Djennoune","sequence":"additional","affiliation":[{"name":"Laboratoire de Conception et Conduite des Syst\u00e8mes de Production, University Mouloud Mammeri, Tizi Ouzou, Algeria"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2017,10,9]]},"reference":[{"key":"bibr1-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1016\/j.cnsns.2014.01.022"},{"key":"bibr2-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1016\/S0960-0779(02)00438-1"},{"key":"bibr3-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-319-30340-6"},{"key":"bibr4-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-319-50249-6"},{"key":"bibr5-0142331217729425","doi-asserted-by":"publisher","DOI":"10.4018\/978-1-61520-737-4"},{"key":"bibr6-0142331217729425","first-page":"1489","volume-title":"Proceedings of the 35th conference on decision and control","author":"Barbot JP","year":"2011"},{"key":"bibr7-0142331217729425","first-page":"103","volume-title":"Sliding-Mode Control in Engineering","author":"Barbot JP","year":"2002"},{"key":"bibr8-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1109\/TCSII.2006.879102"},{"key":"bibr9-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-319-30340-6_28"},{"key":"bibr10-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1155\/S1024123X04309038"},{"key":"bibr11-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1007\/s11071-011-0208-y"},{"key":"bibr12-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1109\/TCT.1964.1082270"},{"key":"bibr13-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1007\/s11071-006-9023-2"},{"key":"bibr14-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1109\/ChiCC.2016.7553870"},{"key":"bibr15-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1002\/cta.4490220404"},{"key":"bibr16-0142331217729425","first-page":"1","author":"Delavari H","year":"2016","journal-title":"IEEE\/CAA Journal of Automatica Sinica"},{"key":"bibr17-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1016\/j.isatra.2016.02.015"},{"key":"bibr18-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1109\/ICoSC.2013.6750844"},{"key":"bibr19-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1109\/TII.2011.2166775"},{"key":"bibr20-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1016\/S0045-7906(00)00057-4"},{"key":"bibr21-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.91.034101"},{"key":"bibr22-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1109\/81.404062"},{"key":"bibr23-0142331217729425","first-page":"264136","author":"Hu JB","year":"2013","journal-title":"Mathematical Problems in Engineering"},{"key":"bibr24-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1007\/s11071-008-9377-8"},{"key":"bibr25-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-21849-1"},{"key":"bibr26-0142331217729425","doi-asserted-by":"publisher","DOI":"10.1016\/j.cnsns.2007.11.011"},{"key":"bibr27-0142331217729425","volume-title":"Theory and Application of Fractional Differential Equations. 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