{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T07:19:51Z","timestamp":1778570391091,"version":"3.51.4"},"reference-count":44,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2016,12,28]],"date-time":"2016-12-28T00:00:00Z","timestamp":1482883200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>How to develop a trust management model and then to efficiently control and manage nodes is an important issue in the scope of social network security. In this paper, a trust management model based on a cloud model is proposed. The cloud model uses a specific computation operator to achieve the transformation from qualitative concepts to quantitative computation. Additionally, this can also be used to effectively express the fuzziness, randomness and the relationship between them of the subjective trust. The node trust is divided into reputation trust and transaction trust. In addition, evaluation methods are designed, respectively. Firstly, the two-dimension trust cloud evaluation model is designed based on node\u2019s comprehensive and trading experience to determine the reputation trust. The expected value reflects the average trust status of nodes. Then, entropy and hyper-entropy are used to describe the uncertainty of trust. Secondly, the calculation methods of the proposed direct transaction trust and the recommendation transaction trust involve comprehensively computation of the transaction trust of each node. Then, the choosing strategies were designed for node to trade based on trust cloud. Finally, the results of a simulation experiment in P2P network file sharing on an experimental platform directly reflect the objectivity, accuracy and robustness of the proposed model, and could also effectively identify the malicious or unreliable service nodes in the system. In addition, this can be used to promote the service reliability of the nodes with high credibility, by which the stability of the whole network is improved.<\/jats:p>","DOI":"10.3390\/e19010011","type":"journal-article","created":{"date-parts":[[2016,12,28]],"date-time":"2016-12-28T11:22:14Z","timestamp":1482924134000},"page":"11","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["A Cloud Theory-Based Trust Computing Model in Social Networks"],"prefix":"10.3390","volume":"19","author":[{"given":"Fengming","family":"Liu","sequence":"first","affiliation":[{"name":"School of Management Science and Engineering, Shandong Normal University, Ji\u2019nan 250014, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoqian","family":"Zhu","sequence":"additional","affiliation":[{"name":"School of Management Science and Engineering, Shandong Normal University, Ji\u2019nan 250014, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuxi","family":"Hu","sequence":"additional","affiliation":[{"name":"Computer Science Faculty, The University of California at Davis, One Shields Ave., Davis, CA 95616, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lehua","family":"Ren","sequence":"additional","affiliation":[{"name":"School of Management Science and Engineering, Shandong Normal University, Ji\u2019nan 250014, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Henric","family":"Johnson","sequence":"additional","affiliation":[{"name":"Faculty of Computer Sciences, Blekinge Institute of Technology, 37141 Karlskrona, Sweden"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2016,12,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"103","DOI":"10.1504\/IJSN.2006.010827","article-title":"Building trust in peer-to-peer systems: A review","volume":"1","author":"Zhu","year":"2006","journal-title":"Int. J. Secur. Netw."},{"key":"ref_2","first-page":"258","article-title":"Free riding on Gnutella revisited: The bell tolls","volume":"6","author":"Hughes","year":"2005","journal-title":"IEEE Comput. Soc."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"244","DOI":"10.1016\/j.comnet.2014.08.010","article-title":"Trust-based incentive mechanism to motivate cooperation in hybrid P2P networks","volume":"73","author":"Tian","year":"2014","journal-title":"Comput. Netw."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1016\/j.ins.2013.02.034","article-title":"Understanding the effects of P2P dynamics on trust bootstrapping","volume":"236","author":"Herrera","year":"2013","journal-title":"Inf. Sci."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1208","DOI":"10.1016\/j.proenv.2012.01.409","article-title":"Research of trust model in P2P file-sharing system","volume":"12","author":"Zhao","year":"2012","journal-title":"Procedia Environ. Sci."},{"key":"ref_6","unstructured":"Blaze, M., Feigenbaum, J., and Lacy, J. (1996, January 6\u20138). Decentralized trust management. Proceedings of the Symposium on Security and Privacy, Oakland, CA, USA."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"276","DOI":"10.1002\/smj.2208","article-title":"Sources of alliance partner trustworthiness: Integrating calculative and relational perspectives","volume":"36","author":"Schilke","year":"2015","journal-title":"Strateg. Manag. J."},{"key":"ref_8","unstructured":"Johnson, H., Lavesson, N., Zhao, H., and Wu, S.F. (2011). Trustworthy Internet, Part 3, Springer."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"41","DOI":"10.2308\/bria-51467","article-title":"Material Control Weakness Corrections: The Enduring Effects of Trust in Management","volume":"28","author":"Rose","year":"2016","journal-title":"Behav. Res. Account."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Nejdl, W., Olmedilla, D., and Windlett, M. (2004, January 30). PeerTrust: Automated trust negotiation for peers on the semantic web. Proceedings of the Workshop on Secure Data management in a Connected World, Toronto, ON, Canada.","DOI":"10.1007\/978-3-540-30073-1_9"},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Erlandsson, F., Johnson, H., and Boldt, M. (2012, January 3\u20135). Privacy Threats Related to User Profiling in Online Social Networks. Proceedings of the Third International Workshop on Security and Privacy in Social Networks 2012 (SPSN-2012), Canterburry, UK.","DOI":"10.1109\/SocialCom-PASSAT.2012.16"},{"key":"ref_12","first-page":"200","article-title":"A trust-based service evaluation and selection model in pervasive computing environment","volume":"17","author":"Chen","year":"2006","journal-title":"J. Softw."},{"key":"ref_13","first-page":"211","article-title":"A self-government model peer-to-peer trust management","volume":"34","author":"Zhang","year":"2008","journal-title":"J. Beijing Univ. Technol."},{"key":"ref_14","first-page":"763","article-title":"Evaluation mechanism for user behavior trust based on DSW","volume":"50","author":"Tian","year":"2010","journal-title":"J. Tsinghua Univ. (Sci. Technol.)"},{"key":"ref_15","first-page":"37","article-title":"Fuzzy trust model for wireless sensor networks with intrusion tolerance","volume":"31","author":"Wang","year":"2010","journal-title":"J. Commun."},{"key":"ref_16","first-page":"75","article-title":"Services trust evaluation model based on cloud computing","volume":"10","author":"Liu","year":"2011","journal-title":"Softw. Guide"},{"key":"ref_17","first-page":"190","article-title":"Evaluation method based on human trust mechanism for mobile e-commerce trust","volume":"39","author":"Fan","year":"2012","journal-title":"Comput. Sci."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Beth, T., Borcherding, M., and Klein, B. (1994, January 7\u20139). Valuation of trust in open networks. Proceedings of the European Symposium on Research in Security, Brighton, UK.","DOI":"10.1007\/3-540-58618-0_53"},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"J\u00f8sang, A., and Knapskog, S.J. (1998). A Metric for Trusted Systems, Global IT Security, Wien, Austrian Computer Society.","DOI":"10.1007\/978-0-387-35259-6_19"},{"key":"ref_20","unstructured":"J\u00f8sang, A. (1999, January 1\u20132). Trust-based decision making for electronic transactions. Proceedings of the 4th Nordic Workshop on Secure Computer Systems, Kista, Sweden."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"2348","DOI":"10.1109\/TC.2015.2389952","article-title":"Smart Cloud Storage Service Selection Based on Fuzzy Logic, Theory of Evidence and Game Theory","volume":"65","author":"Esposito","year":"2016","journal-title":"IEEE Trans. Comput."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Ullah, Z., Khan, M.S., Ahmed, I., Javaid, N., and Khan, M.I. (2016). Fuzzy-Based Trust Model for Detection of Selfish Nodes in MANETs. Adv. Inf. Netw. Appl., 965\u2013972.","DOI":"10.1109\/AINA.2016.142"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2944","DOI":"10.1109\/TPDS.2013.309","article-title":"MobiFuzzyTrust: An Efficient Fuzzy Trust Inference Mechanism in Mobile Social Networks","volume":"25","author":"Hao","year":"2014","journal-title":"IEEE Trans. Parallel Distrib. Syst."},{"key":"ref_24","first-page":"73","article-title":"Uncertainty in knowledge representation","volume":"2","author":"Li","year":"2000","journal-title":"Eng. Sci."},{"key":"ref_25","first-page":"235","article-title":"Some statistical analysis of the normal cloud model","volume":"34","author":"Liu","year":"2005","journal-title":"Inf. Control"},{"key":"ref_26","first-page":"28","article-title":"Study on universality of the normal cloud model","volume":"6","author":"Li","year":"2004","journal-title":"Eng. Sci."},{"key":"ref_27","first-page":"1583","article-title":"Artificial intelligence with uncertainty","volume":"15","author":"Liu","year":"2004","journal-title":"J. Softw."},{"key":"ref_28","first-page":"158","article-title":"Intrusion detection using cloud model","volume":"29","author":"Zhao","year":"2003","journal-title":"Comput. Eng. Appl."},{"key":"ref_29","first-page":"930","article-title":"Cloud theory and its applications in spatial data mining and knowledge discovery","volume":"4","author":"Di","year":"1999","journal-title":"J. Image Graph."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"He, R., Niu, J., and Zhang, G. (2005). CBTM: A Trust Model with Uncertainty Quantification and Reasoning for Pervasive Computing, Springer. LNCS 3758.","DOI":"10.1007\/11576235_56"},{"key":"ref_31","unstructured":"Marsh, S. (1994). Formalising Trust as a Computational Concept, University of Stirling."},{"key":"ref_32","first-page":"1","article-title":"A Roadmap for Establishing Trust Management Strategy in E-Commerce Services Using Quality Based Assessment","volume":"6","author":"Jairak","year":"2016","journal-title":"Int. J. Inf. Eng. Electron. Bus."},{"key":"ref_33","unstructured":"Abdul-Rahman, A., and Hails, S. (2000, January 4\u20137). Supporting trust in virtual communities. Proceedings of the Hawaii International Conference on System Sciences, Maui, HI, USA."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1109\/TDSC.2011.57","article-title":"SecuredTrust: A Dynamic Trust Computation Model for Secured Communication in Multiagent Systems","volume":"9","author":"Das","year":"2012","journal-title":"IEEE Trans. Depend. Secur. Comput."},{"key":"ref_35","doi-asserted-by":"crossref","unstructured":"Chatzopoulos, D., Ahmadi, M., Kosta, S., and Hui, P. (2016, January 21\u201324). Have you asked your neighbors? A Hidden Market approach for device-to-device offloading. Proceedings of the 2016 IEEE 17th International Symposium on A World of Wireless, Mobile and Multimedia Networks (WoWMoM), Coimbra, Portugal.","DOI":"10.1109\/WoWMoM.2016.7523497"},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1109\/MCOM.2016.7509388","article-title":"OPENRP: A reputation middleware for opportunistic crowd computing","volume":"45","author":"Chatzopoulos","year":"2016","journal-title":"IEEE Commun. Mag."},{"key":"ref_37","unstructured":"Wang, Y., and Vassileva, J. (2003, January 13\u201317). Bayesian network-based trust model. Proceedings of the IEEE International Conference on Web Intelligence, Halifax, NS, Canada."},{"key":"ref_38","first-page":"938","article-title":"Distributed peer-to-peer trust model and computer simulation","volume":"18","author":"Yuan","year":"2006","journal-title":"J. Syst. Simul."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1654","DOI":"10.1360\/crad20051002","article-title":"Research on a fuzzy logic-based subjective trust management model","volume":"42","author":"Tang","year":"2005","journal-title":"Comput. Res. Dev."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1341","DOI":"10.3724\/SP.J.1001.2010.03501","article-title":"Evaluation approach of subjective trust based on cloud model","volume":"21","author":"Wang","year":"2010","journal-title":"J. Softw."},{"key":"ref_41","unstructured":"He, R., Niu, J., Yuan, M., and Hu, J. (2004, January 14\u201316). A novel cloud-based trust model for pervasive computing. Proceedings of the Fourth International Conference on Computer and Information Technology, Wuhan, China."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"859","DOI":"10.1002\/int.20028","article-title":"A novel ecological network-based computation platform as grid middleware system","volume":"19","author":"Gao","year":"2004","journal-title":"Int. J. Intell. Syst."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"722","DOI":"10.1016\/j.ins.2006.08.005","article-title":"Communication mechanisms in ecological network-based grid middleware for service emergence","volume":"177","author":"Ding","year":"2007","journal-title":"Inf. Sci."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"347","DOI":"10.1080\/03081070600661069","article-title":"An adaptive social network-inspired approach to resource discovery for the complex grid systems","volume":"35","author":"Gao","year":"2006","journal-title":"Int. J. Gen. 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