{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,26]],"date-time":"2025-10-26T21:40:13Z","timestamp":1761514813449,"version":"build-2065373602"},"reference-count":36,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2021,9,16]],"date-time":"2021-09-16T00:00:00Z","timestamp":1631750400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"High level introduction of talent research start-up fund of Nanjing Institute of Technology","award":["YKJ201989"],"award-info":[{"award-number":["YKJ201989"]}]},{"name":"Major Project of Philosophy and Social Science Research in Universities of Jiangsu Province Education Department","award":["2020SJZDA069"],"award-info":[{"award-number":["2020SJZDA069"]}]},{"name":"Innovation Fund General Project I of Nanjing Institute of Technology","award":["CKJB202003"],"award-info":[{"award-number":["CKJB202003"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>The multi-source data collected by the power Internet of Things (IoT) provide the data foundation for the power big data analysis. Due to the limited computational capability and large amount of data collection terminals in power IoT, the traditional security mechanism has to be adapted to such an environment. In order to ensure the security of multi-source data in the power monitoring networks, a security system for multi-source big data in power monitoring networks based on the adaptive combined public key algorithm and an identity-based public key authentication protocol is proposed. Based on elliptic curve cryptography and combined public key authentication, the mapping value of user identification information is used to combine the information in a public and private key factor matrix to obtain the corresponding user key pair. The adaptive key fragment and combination method are designed so that the keys are generated while the status of terminals and key generation service is sensed. An identification-based public key authentication protocol is proposed for the power monitoring system where the authentication process is described step by step. Experiments are established to validate the efficiency and effectiveness of the proposed system. The results show that the proposed model demonstrates satisfying performance in key update rate, key generation quantity, data authentication time, and data security. Finally, the proposed model is experimentally implemented in a substation power IoT environment where the application architecture and security mechanism are described. The security evaluation of the experimental implementation shows that the proposed model can resist a series of attacks such as counterfeiting terminal, data eavesdropping, and tampering.<\/jats:p>","DOI":"10.3390\/sym13091718","type":"journal-article","created":{"date-parts":[[2021,9,22]],"date-time":"2021-09-22T03:47:35Z","timestamp":1632282455000},"page":"1718","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["A Multi-Source Big Data Security System of Power Monitoring Network Based on Adaptive Combined Public Key Algorithm"],"prefix":"10.3390","volume":"13","author":[{"given":"Chengzhi","family":"Jiang","sequence":"first","affiliation":[{"name":"Nanjing Institute of Technology, Nanjing 211167, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chuanfeng","family":"Huang","sequence":"additional","affiliation":[{"name":"Nanjing Institute of Technology, Nanjing 211167, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qiwei","family":"Huang","sequence":"additional","affiliation":[{"name":"Nanjing Institute of Technology, Nanjing 211167, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jian","family":"Shi","sequence":"additional","affiliation":[{"name":"Nanjing Zhiqing Information Technology Co., Ltd., Nanjing 210008, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Ganguly, P., Nasipuri, M., and Dutta, S. 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