Abstract
The development of Internet of Things (IoT) and Mobile Edge Computing (MEC) has led to close cooperation between electronic devices. It requires strong reliability and trustworthiness of the devices involved in the communication. However, current trust mechanisms have the following issues: (1) heavily relying on a trusted third party, which may incur severe security issues if it is corrupted, and (2) malicious evaluations on the involved devices which may bias the trustrank of the devices. By introducing the concepts of risk management and blockchain into the trust mechanism, we here propose a blockchain-based trust mechanism for distributed IoT devices in this paper. In the proposed trust mechanism, trustrank is quantified by normative trust and risk measures, and a new storage structure is designed for the domain administration manager to identify and delete the malicious evaluations of the devices. Evidence shows that the proposed trust mechanism can ensure data sharing and integrity, in addition to its resistance against malicious attacks to the IoT devices.
Highlights
Mobile Edge Computing is a new technology which provides an IT service environment and cloud-computing capabilities at the edge of the mobile network
In order to ensure the reliability of the trust mechanism, a storage structure and identification method are designed for domain manager to identify and filter a large number of malicious evaluations of devices
HTðxj, k, rÞ represents the harmonious trustrank of HðxjÞ, and r represents the number of the normative trust included in risk assessment
Summary
Mobile Edge Computing is a new technology which provides an IT service environment and cloud-computing capabilities at the edge of the mobile network. Ren et al proposed a trust management method suitable for distributed Internet of Things, but they did not consider the irresponsible malicious evaluation problems between malicious devices [27]. (1) Aiming at the dependence of trusted third party, a trust mechanism of Internet of Things based on normative trust and risk trust is proposed This trust mechanism does not rely on any trusted third party, and all trust establishment and trust management are completely managed and maintained by IOT domain administrators and IOT devices (2) Aiming at the phenomenon of malicious evaluation of devices by existing mechanisms, a trust data storage scheme based on blockchain is proposed. In order to ensure the reliability of the trust mechanism, a storage structure and identification method are designed for domain manager to identify and filter a large number of malicious evaluations of devices
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