• Journal of Communications and Networks
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• v.11 no.4
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• pp.359-367
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• 2009

Trust-based solutions provide some form of payment to peers to encourage good behavior. The problem with trust management systems is that they require prior knowledge to work. In other words, peers are vulnerable to attack if they do not have knowledge or correct knowledge of other peers in a trust management system. Therefore, considering only trust is inadequate when a decision is made to identify the best set of peers to utilize. In order to solve the problem, we propose a distributed decision-making mechanism for wireless peer-to-peer (P2P) networks based on game theory and relevant trust mechanisms in which we incorporate the element of trust and risk into a single model. The main idea of our mechanism is to use utility function to express the relationship between benefits and costs of peers, and then make the decision based on expected utility as well as risk attitude in a fully distributed fashion. The unique feature of our mechanism is that it not only helps a peer to select its partners, but also mitigates vulnerabilities in trust-based mechanisms. Through analysis and experiments, we believe our approach is useful for peers to make the decision regarding who to interact with. In addition, it is also a good starting point for exploring tradeoffs among risk, trust and utility.

• Journal of Korea Multimedia Society
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• v.11 no.10
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• pp.1409-1419
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• 2008

Inauthentic resources can be easily spread by P2P (Peer-to-Peer) participants due to the openness and anonymity of P2P networks. A possible way to restrict the distribution of inauthentic resources and prevent malicious peers from joining P2P networks is to exploit peers' reputation which reflect their past behaviors and are also helpful to predict peers' future behaviors. There is a possibility that some peers intentionally plays along with other peers in order to increase/decrease its reputation through false feedback exchanges. Therefore, we propose a new reputation management scheme, called TrustRRep (Trustable Resource sharing service using Reputation) scheme, which improves the trustworthiness and efficiency of P2P networks by identifying peers who give false feedback. The TrustRRep scheme is also capable of providing peers with the trustworthiness of shared resources by discriminating resources distributed by malicious peers. We implement the proposed TrustRRep scheme on the NS-2 simulator for evaluating its performance compared to the recent reputation management work available in literature. A case study on simulations shows that the proposed reputation management scheme yields efficient performance in terms of the minimal download ratio and dissemination of inauthentic resources, the efficient identification of peers who give false feedback, and the provisioning of the trustworthiness of peers' reputation. It also shows that the proposed TrustRRep scheme imposes the restrictions of participating P2P networks on a malicious peers by diminishing its trust value.

• Journal of Korea Multimedia Society
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• v.12 no.5
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• pp.717-727
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• 2009

P2P (Peer-to-Peer) network depends on cooperation of peers considerably. However, some peers do not share files at all and only download files. Peers also share low quality files or unpopular files. These selfish behavior of peers is referred to 'free riding'. The free riding of peer may decrease participation of other peers or the system performance. In this paper, we propose an incentive mechanism, called IcMFS (Incentive Mechanism for File Sharing System), which provides the correct use of incentive mechanism using trust peer, computes contribution values referring behavior of peers and rewards peers. The proposed mechanism assigns bandwidth and TTL(Time-To-Live) to a peer and differentiates the use of service. A case study on simulations shows the service differentiation according to the contribution value of peer, the correct use of incentive mechanism using trust peer and the advantage by use of trust peer. To prove the stability of proposed mechanism, we also show the disadvantage that a peer receives from the incorrect use of incentive mechanism.

• Journal of Digital Convergence
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• v.18 no.3
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• pp.123-131
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• 2020

The purpose of this study was to investigate the effect of task conflict on relationship conflict and the effect of relationship conflict on team satisfaction and to examine the moderating role of trust in peers in the relationship between task conflict and relationship conflict and the moderating role of team orientation in the relationship between relationship conflict and team satisfaction. The major findings were as follows: First, it was found that task conflict had a positive effect on relationship conflict and relationship conflict had a negative effect on team satisfaction. Second, it was found that trust in peers moderated the relationship between task conflict and relationship conflict. Third, it was also found that team orientation moderated the relationship between relationship conflict and team satisfaction. Based on the findings, practical implications and suggestions for future studies were provided.

• Journal of Digital Convergence
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• v.11 no.10
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• pp.225-240
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• 2013

This study is intended to identify the relationship between antecedents and performance factors that affect the knowledge-sharing of financial professionals. In order to accomplish the objective, antecedents were established as 'disposition to trust', 'subjective norm', and 'knowledge-sharing willingness' in the personal aspect, and 'trust in peers' and 'management support' in the organizational aspect. As performance factors, 'job satisfaction' and 'firm innovation' were established, and a research model was presented. Empirical analysis was done on the research model using collected questionnaires from 185 financial professionals. The research findings are as follows. First, disposition to trust of financial professionals has a positive effect on their knowledge-sharing. Second, trust in peers and management support have a positive effect on their knowledge-sharing. Among the antecedents, trust in peers has the strongest effect on their knowledge-sharing. Third, knowledge-sharing of financial professionals has a positive effect on their job satisfaction and firm innovation.

• Asia pacific journal of information systems
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• v.15 no.3
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• pp.65-90
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• 2005

One of the major goals of using knowledge management systems(KMS) is the sharing of knowledge. The intent of an individual to share his/her knowledge plays a crucial role in sharing quality knowledge in corporations. However, there is little research that addresses this relationship between the intent to share and the use of KMS both from a holistic perspective and with empirical data analyses. To understand major factors that affect both knowledge sharing intent and the use of KMS, we conducted a field study from eight companies in four different industries which had been using KMS for at least a year. Using confirmatory factor analysis and structured equation modeling techniques, we have analyzed the relationships among top management support, trust among peers, trust in the organizational hierarchy, incentives and rewards, knowledge-sharing intent, KMS quality, knowledge quality, and the use of KMS. The research results show that top management support and trust between peers enhance the intent of sharing knowledge. We also found that top management support, knowledge-sharing intent, incentives and rewards, and the quality of knowledge have positive relationships with the use of KMS.

• Knowledge Management Research
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• v.3 no.1
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• pp.19-39
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• 2002

Many companies have tried, with mixed success, to leverage knowledge resources by knowledge sharing functions. Trust is one of the integral factors for fostering knowledge sharing. This paper categorizes trust on the basis of its multi-dimension and multi-level. In view of this category, it investigates the relationship between trust and knowledge sharing. A sample of 191 employees from 24 companies is used for an empirical exploration. Our analysis results imply that both organizational trust and trust among peers are crucial for effective knowledge sharing.

• The Journal of the Korea Contents Association
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• v.19 no.7
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• pp.271-280
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• 2019

This study is to understand the effect of attachment and deviant peers on juvenile recidivism. The study analyzes a panel of Korean children, youths, and students who are in first year of middle school, and obtains the following results: First, juvenile recidivism increases by 1,5 times, from 180 people (10.2%) in third year of middle school to 278 people (15.7%) in third and last year of high school. 138 people stopped deviant behaviors (72.7%) and 42 people continued such acts (23.3%), showing that children come to stop deviant acts more than not. 236 people (85.6%) are found to have experienced engaging in deviant behaviors during third year of high school. Second, in terms of the effect of attachment and deviant peers in juvenile deviance, particularly attachment to parents, parental affection is found to have a negative (-) effect in third year of middle school, while parental supervision is found to have a negative (-) effect. In peer attachment, peer trust is found to havee positive (+) effects in third year of middle school and deviant peers are found to have positive (+) effects in third year of middle school and third year of high school. Third, in terms of the effect of youth attachment and deviant peers in juvenile recidivism, parental supervision has a negative (-) effect and deviant peers have a positive (+) effect. However, parental affection and peer attachment (friendship, trust) are not found to have an effect. Based on these results, the current study narrates suggestions for the practice of youth welfare.

• Journal of Korean Home Economics Education Association
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• v.25 no.2
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• pp.147-167
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• 2013

This study aimed to analyze the relative effects of parents' child-rearing attitudes and the quality of peer and teacher relationships on poor adolescents' self-resilience and self-esteem. The subjects were 639 1st grade middle school students from the firstly poor, the secondary poor, and the thirdly poor families who participated in the Korea Child Youth Panel Surveys(KCYPS). The data were analyzed with descriptive statistics and hierarchical regressions. The results of this study were as follows. Firstly, the poor adolescents' self-resilience were influenced by the quality of peer relationships, parents' child-rearing attitudes, and the quality of teacher relationships in order and the specific variables enhancing adolescents' self-resilience were communication between adolescents and peers, trust with peers, parents' love, reasonable explanation, supervision, and teacher-adolescents' friendly relationships. Secondly, the poor adolescents' self-esteem were influenced by parents' child-rearing attitudes, the quality of peer relationships, and the quality of teacher relationships in order and the specific variables enhancing adolescents' self-esteem were parents' love, supervision, inconsistency, senses of non-alienation among peers, communication between adolescents and peers, trust with peers, and teacher-adolescents' friendly relationships. Finally, the future directions of education welfare programs targeting poor adolescents were suggested on the basis of the results.

• Korean Journal of Family Welfare
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• v.23 no.4
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• pp.633-652
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• 2018

This study aimed to examine the direct effects of relationships with parents, peers, and community child center teachers on the school adjustment of low-income adolescents attending community child centers and the indirect effects mediated through adolescents' resilience. The second-term panel data from the fourth-year Community Child Center Survey was used to analyze 198 adolescents (103 boys, 95 girls) who were first graders at middle schools. SPSS 20.0 and AMOS 20.0 were used to analyze the data through structural equation modeling. The results of the study were as follows: Parental monitoring and peer trust had direct effects on the adolescents' school adjustment, while satisfaction with community child center teachers did not. Parental monitoring, peer trust, and satisfaction with community child center teachers had indirect effects on adolescents' school adjustment mediated through resilience. The school adjustment of low-income adolescents has received attention from both researchers and politicians. The results of this study are notable in that both the important relationships and resilience of low-income adolescents can significantly contribute to their school adjustment in their first year at middle school. Given the developmental needs of low-income adolescents, interventions for school adjustment that consider adolescents' important social contexts and psychological characteristics should be developed.