| Popis: |
When deploying wireless sensor networks (WSNs) in practical applications, access control systems can limit access to sensitive information only to trusted entities and provide a capability to resist against various attacks from malicious nodes. However, due to the characteristics of highly distributed and resource-constrained, applying conventional access control models to WSNs is significantly challenging. In this paper, a distributed and fine-grained access control model based on the trust and risk degree is proposed (TC-BAC). We first introduce a trust evaluation mechanism to meet the security requirements of access control systems. Then, a risk function is proposed to assess the behavior of nodes and evaluate the risk factor of the access. The simulation results show that TC-BAC can achieve both intended security and high efficiency of the network. |
