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Using asymmetric keys in a certified trust model for multiagent systems |
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| Authors: | Vanderson Botêlho Fabrício Enembreck Bráulio Ávila Hilton de Azevedo Edson Scalabrin |
| Affiliation: | 1. School of Computer Science, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran;2. Department of Computer Engineering, Sharif University of Technology, Tehran, Iran;3. Department of Computer Engineering, Shahed University, Tehran, Iran;1. Computational Intelligence Research Group, Department of Computer and Information Sciences, Faculty of Engineering and Environment, University of Northumbria, Newcastle NE1 8ST, UK;2. Department of Information Technology, Jadavpur University, Kolkata, India;3. Institute for Intelligent Systems Research and Innovation, Deakin University, Waurn Ponds, VIC 3216, Australia;4. School of Instrument Science and Engineering, Southeast University, Nanjing 210018, PR China;1. ECE and INMC, Seoul National University, Republic of Korea;2. EECS, University of California at Berkeley, CA, USA;3. ECE, Ulsan National Institute of Science and Technology, Republic of Korea |
| Abstract: | We present a contribution based on encryption to the model for the certification of trust in multiagent systems. The originality of the proposal remains in the use of asymmetric keys that allow the local storage of testimonies with the service agents that were assessed. The aim is to raise the level of efficiency that client agents have when contracting specialized service agents. To reach this objective we make three hypotheses: (i) client agents are able to measure and inform the quality of a service they receive from a service agent; (ii) distributed certificate control is possible if every service agent stores the certificates it receives from its client agents and, (iii) the content of a certificate can be considered safe as long as the public and private keys used to encrypt the certificate remain safe. This approach reduces some weak points of trust models that rely on the direct interaction between service and client agents (direct trust) or those that rely on testimony obtained from client agents (propagated trust). Simulation showed that encrypted certificates of trust improved the efficiency of client agents when choosing their service provider agents. The reason seems to be that the reputation of a given service provider agent is based on the reputation it has among the totality of client agents that used its services. |
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