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In addition, in order to prevent cyberattacks on critical national infrastructures and key facilities, we implemented symmetric-key and secure hash algorithm-based hardware security modules in the key elements of the sensing device. A preliminary test was conducted prior to a field trial to verify the performance of the developed sensing device. The accuracy and stability of the sensing device were then verified for 1 month in a field test at facilities for energy storage systems and photovoltaic converters in sewage treatment plants.<\/jats:p>","DOI":"10.3390\/s21051620","type":"journal-article","created":{"date-parts":[[2021,2,26]],"date-time":"2021-02-26T04:36:24Z","timestamp":1614314184000},"page":"1620","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A Sensing Device with the Optical Temperature Sensors-Based Quad-RX Module and a Security Module"],"prefix":"10.3390","volume":"21","author":[{"given":"Kyeeun","family":"Kim","sequence":"first","affiliation":[{"name":"Optical ICT Convergence Section, Electronics and Telecommunications Research Institute, Gwangju 34129, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3815-828X","authenticated-orcid":false,"given":"Siwoong","family":"Park","sequence":"additional","affiliation":[{"name":"Optical ICT Convergence Section, Electronics and Telecommunications Research Institute, Gwangju 34129, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chanil","family":"Yeo","sequence":"additional","affiliation":[{"name":"Optical ICT Convergence Section, Electronics and Telecommunications Research Institute, Gwangju 34129, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8258-3224","authenticated-orcid":false,"given":"Hyoung-Jun","family":"Park","sequence":"additional","affiliation":[{"name":"Optical ICT Convergence Section, Electronics and Telecommunications Research Institute, Gwangju 34129, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hyunjin","family":"Kim","sequence":"additional","affiliation":[{"name":"Optical ICT Convergence Section, Electronics and Telecommunications Research Institute, Gwangju 34129, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Young Soon","family":"Heo","sequence":"additional","affiliation":[{"name":"Optical ICT Convergence Section, Electronics and Telecommunications Research Institute, Gwangju 34129, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hyun Seo","family":"Kang","sequence":"additional","affiliation":[{"name":"Optical ICT Convergence Section, Electronics and Telecommunications Research Institute, Gwangju 34129, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kyungsoo","family":"Kim","sequence":"additional","affiliation":[{"name":"IMR, Gwangju 61008, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,2,25]]},"reference":[{"key":"ref_1","unstructured":"Geoffrey, W., Jeff, J., Mario, R., Jonathan, L., and Matt, W. 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