• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.8
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• pp.3766-3788
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• 2017

A blockchain is an underlying technology and basic infrastructure of the Bitcoin system. At present, blockchains and their applications are developing rapidly. However, the basic research of blockchain technology is still in the early stages. The efficiency and reliability of blockchain communication is one of the research problems that urgently need to be studied and addressed. Existing algorithms may be less feasible for blockchain-based communication because they only consider a single communication factor (node communication capability or node trust degree) and only focus on a single communication performance parameter(communication time or communication reliability). In this paper, to shorten the validation time of blockchain transactions and improve the reliability of blockchain-based communication, we first establish a multi-link concurrent communication model based on trust degree, and then we propose a novel integrated factor communication tree algorithm (IFT). This algorithm comprehensively considers the node communication link number and the node trust degree and selects several nodes with powerful communication capacity and high trust as the communication sources to improve the concurrency and communication efficiency. Simulation results indicate that the IFT algorithm outperforms existing algorithms. A blockchain communication routing scheme based on the IFT algorithm can increase communication efficiency by ensuring communication reliability.

• Asia-Pacific Journal of Business
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• v.10 no.1
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• pp.39-54
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• 2019

The purpose of this study is to research the effect of organizational culture on trust and communication. Also, the study explores whether trust and communication affects innovative behavior and the mediation effect on innovative behavior among organizational culture, trust and communication. This study analyzed the mediating effect with SEM using data from the HCCP in 2015. The results of the study are as follows. First, it was found that innovative, collective and rational culture positively influence but hierarchical culture negatively influence trust and communication. Second, trust and communication have a positive effect on innovative behavior and trust has a positive effect on communication. Third, the effect innovative, collective hierarchical and rational culture on innovative behavior is mediated through trust and communication. Therefore, this study suggests creating an innovative, relationship-based and goal-oriented organizational culture which increases trust and communication that facilitates innovative behavior.

• Journal of KIISE
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• v.42 no.5
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• pp.551-557
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• 2015

The technology using ARM TrustZone draws attention as a new embedded virtualization approach. The ARM TrustZone defines two virtual execution environment, the secure world and the normal world. In such an environment, the inter-world communication is important to extend function of software. However, the current monitor software does not sufficiently support the inter-world communication. This paper presents a new inter guestOS communication scheme, for each world, for the ARM TrustZone virtualization. The proposed communication scheme supports bidirectional inter-world communication for single core and multicore environment. In this paper, It is implemented on a NVIDIA Tegra3 processor based on the ARM Cortex-A9 MPCore and it showed a bandwidth of 30MB/s.

• Knowledge Management Research
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• v.18 no.2
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• pp.23-43
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• 2017

This study analyzes the structural relationships among communication pattern of leader, followers' trust in leader, organizational commitment and innovative behavior. In order to analyze hypotheses, the survey was collected by distributing questionnaire to 250 workers in small and medium-sized companies. As a result, total 213 workers participated in the survey and their rates were included for the test process. The collected data analyzed structural equation modeling, a statistical program. The results of this study are as follows; First, supportive and reflective communication pattern of leader have meaningful positive influences on followers'trust in leader. Directive communication pattern of leader, by contrast, is negatively related to followers'trust in leader. Second, followers'trust in leader has a positive impact on organizational commitment. Third, organizational commitment has a positive effect on followers'innovative behavior. Based on these results, it can be said that followers'trust in leader is more important for boosting organizational commitment and innovative behavior because it has a positive effect on organizational commitment with supportive or reflective communication behavior of leader. Therefore, this study proposes practical benefits to leaders regarding how to display communication process and trust quality more effectively. Future studies are required to investigate the research agendas on the issues between communication patterns and innovative behavior.

• Journal of Fisheries and Marine Sciences Education
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• v.27 no.1
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• pp.108-114
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• 2015

The purpose of this study is to find the relationships among communication competency, social network centrality(trust centrality and knowledge sharing centrality), discussion performance, and online boarding activity in the team based learning situation. For investigating this topic, 44 students are participated in the classes of educational technology. In order to find out the relationships among communication competency, social network centrality, discussion performance, and online boarding activity, compared t-test and path analysis are used. Followings are the results of the research: (a) Communication competency is improved significantly after team based learning. (b) Trust centrality effects significantly on the knowledge sharing centrality. (c) Knowledge sharing effects significantly on discussion performance. (d) Trust centrality effects on the online boarding activity in the team based learning.

• International journal of advanced smart convergence
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• v.8 no.4
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• pp.169-178
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• 2019

Due to the characteristics of an ad hoc network without a control center, self-organization, and flexible topology, the trust evaluation of the nodes in the network is extremely difficult. Based on the analysis of ad hoc networks and the blockchain technology, a blockchain-based node-level trust evaluation model is proposed. The concepts of the node trust degree of the HASH list on the blockchain and the perfect reward and punishment mechanism are adopted to construct the node trust evaluation model of the ad hoc network. According to the needs of different applications the network security level can be dynamically adjusted through changes in the trust threshold. The simulation experiments demonstrate that ad-hoc on-demand distance vector(AODV) Routing protocol based on this model of multicast-AODV(MAODV) routing protocol shows a significant improvement in security compared with the traditional AODV and on-demand multipath distance vector(AOMDV) routing protocols.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.16 no.6
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• pp.420-433
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• 2023

With the development of ICT technologies, various systems and services based on data have been introduced. Also, raising the importance of technologies that provide trust to a data, infrastructure, and services. for ICT services. However, in the existing ICT service environment, there is no way to objectively judge and manage the trust of various components (content, infrastructure, process, service provider, etc) that constitute a specific service, and there is a limitation that we can only rely on the service provider's own quality standards. This paper provides requirements, functional archtecture, and procedures for providing reliable ICT services from the perspective of ITU-T international standards. Trust-enabled service provisioning adds additional functions for providing trust to existing ICT service entities (service resources, stakeholders, and users), collecting, analyzing, and providing trust related information. Therefore, a users can consider the trust of various service components based on analyzed trust information based on their trust requirements.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.9 no.4
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• pp.1529-1547
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• 2015

Establishment of trust is important in wireless sensor networks for security enhancement and successful collaboration. Basically, a node establishes trust with other nodes by estimating a trust value based on monitored behavior of the other nodes. Since a malicious/misbehaving node might launch different attack strategies and might demonstrate random misbehavior, a trust estimation method should be robust against such attacks and misbehavior. Otherwise, the operation of trust establishment will be meaningless, and performance of an application that runs on top of trust establishment will degrade. In this paper, we propose a robust and novel trust estimation method. Unlike traditional trust estimation methods, we consider not only the weight of misbehavior but also the frequency of misbehavior. The frequency-of-misbehavior component explicitly demonstrates how frequently a node misbehaves during a certain observed time period, and it tracks the behavior of nodes more efficiently, which is a main factor in deriving an accurate trust value. In addition, the weight of misbehavior is comprehensively measured to mitigate the effect of an on-off attack. Frequency and weight of misbehavior are comprehensively combined to obtain the trust value. Evaluation results show that the proposed method outperforms other trust estimation methods under different attacks and types of misbehavior.

• Korean journal of food and cookery science
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• v.26 no.3
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• pp.272-280
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• 2010

The purpose of this study was to understand the interrelationships between the customers' perception of verbal and nonverbal communication, customers' trust and satisfaction in the family restaurant. Based on a total of 310 samples that were obtained from empirical research, this study reviewed the reliability and fitness of the research model and verified a total of 2 hypotheses using the Amos program. The hypothesized relationships in the model were tested simultaneously using a structural equation model(SEM). The proposed model provided an adequate fit to the data, $X^2$=953.126(df=417), p<.001, CMIN/df 2.286, GFI .831, NFI .889, IFI .934, TLI .926, CFI .934. The results showed that employees' verbal communication ($\beta$=.264), paralanguage ($\beta$=.172) and physical appearance ($\beta$=.120) among the nonverbal communications had a significant positive effect on the customers' trust. In addition, the customers' trust ($\beta$=.644) had a significant positive effect on the customer satisfaction. Limitations and future research directions are also discussed.

• Journal of the Korea Convergence Society
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• v.6 no.6
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• pp.213-219
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• 2015

This study examines how the features of communication on Social Network Service(SNS) affect building faculty trust and long-term orientation in professor-student relationships. The research model was developed based on the previous research about communication, SNS and relationship development. The researcher surveyed 210 students to collect research data, and 195 questionnaires were analyzed using SmartPLS. The results indicate that the quality, frequency, interactivity and openness of communication on SNS affect positively on faculty trust. Moreover, the quality, frequency and openness of communication on SNS affect positively on long-term orientation, whereas interactivity does not. This mean that faculty trust plays a mediating role between interactivity and long-term orientation.