{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:32:22Z","timestamp":1760239942065,"version":"build-2065373602"},"reference-count":34,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2019,2,1]],"date-time":"2019-02-01T00:00:00Z","timestamp":1548979200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"the National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61402225"],"award-info":[{"award-number":["61402225"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"the National Natural Science Foundation of Jiangsu Province under Grant","award":["BK20140832"],"award-info":[{"award-number":["BK20140832"]}]},{"name":"the China Postdoctoral Science Foundation","award":["2013M540447"],"award-info":[{"award-number":["2013M540447"]}]},{"name":"the Jiangsu Postdoctoral Science Foundation","award":["1301020C"],"award-info":[{"award-number":["1301020C"]}]},{"name":"State Key Laboratory for smart grid protection and operation control Foundation","award":["NO"],"award-info":[{"award-number":["NO"]}]},{"name":"Science and Technology Funds from National State Grid Ltd.","award":["The Research on Key Technologies of Distributed Parallel Database Storage and Processing based on Big Data"],"award-info":[{"award-number":["The Research on Key Technologies of Distributed Parallel Database Storage and Processing based on Big Data"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>IoT devices are now enriching people\u2019s life. However, the security of IoT devices seldom attracts manufacturers\u2019 attention. There are already some solutions to the problem of connecting a smart device to a user\u2019s wireless network based on the 802.11 transmission such as Smart Config from TI. However, it is insecure in many situations, and it does not have a satisfactory transmission speed, which does not mean that it has a low bit rate. It usually takes a long time for the device to recognize the data it receives and decode them. In this paper, we propose a new Wi-Fi connection method based on audio waves. This method is based on MFSK (Multiple frequency-shift keying) and works well in short distance, which enables the correctness and efficiency. In addition, audio waves can hardly be eavesdropped, which provides higher security than other methods. We also put forward an encryption solution by using jamming signal, which can greatly improve the security of the transmission.<\/jats:p>","DOI":"10.3390\/s19030618","type":"journal-article","created":{"date-parts":[[2019,2,1]],"date-time":"2019-02-01T11:19:58Z","timestamp":1549019998000},"page":"618","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Tell the Device Password: Smart Device Wi-Fi Connection Based on Audio Waves"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4903-2666","authenticated-orcid":false,"given":"Liang","family":"Liu","sequence":"first","affiliation":[{"name":"College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhaoyang","family":"Han","sequence":"additional","affiliation":[{"name":"College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Liming","family":"Fang","sequence":"additional","affiliation":[{"name":"College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zuchao","family":"Ma","sequence":"additional","affiliation":[{"name":"College of Computer Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,2,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Zhang, Z., Cho, M.C.Y., Wang, C., Hsu, C., Chen, C., and Shieh, S. 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