Department of Computer Science, COMSATS University Islamabad, Islamabad 44000, Pakistan.
School of Computer Science, University of Technology Sydney, Ultimo, NSW 2007, Australia.
Sensors (Basel). 2022 Jan 6;22(2):411. doi: 10.3390/s22020411.
In this paper, an encryption and trust evaluation model is proposed on the basis of a blockchain in which the identities of the Aggregator Nodes (ANs) and Sensor Nodes (SNs) are stored. The authentication of ANs and SNs is performed in public and private blockchains, respectively. However, inauthentic nodes utilize the network's resources and perform malicious activities. Moreover, the SNs have limited energy, transmission range and computational capabilities, and are attacked by malicious nodes. Afterwards, the malicious nodes transmit wrong information of the route and increase the number of retransmissions due to which the SNs' energy is rapidly consumed. The lifespan of the wireless sensor network is reduced due to the rapid energy dissipation of the SNs. Furthermore, the throughput increases and packet loss increase with the presence of malicious nodes in the network. The trust values of SNs are computed to eradicate the malicious nodes from the network. Secure routing in the network is performed considering residual energy and trust values of the SNs. Moreover, the Rivest-Shamir-Adleman (RSA), a cryptosystem that provides asymmetric keys, is used for securing data transmission. The simulation results show the effectiveness of the proposed model in terms of high packet delivery ratio.
本文提出了一种基于区块链的加密和信任评估模型，其中存储了聚合节点 (AN) 和传感器节点 (SN) 的身份。AN 和 SN 的身份验证分别在公有和私有区块链中进行。然而，不诚实的节点会利用网络资源并进行恶意活动。此外，SN 的能量、传输范围和计算能力有限，并且受到恶意节点的攻击。随后，恶意节点会传输错误的路由信息，并由于增加了重传次数，导致 SN 的能量迅速消耗。由于 SN 的能量迅速消耗，无线传感器网络的寿命缩短。此外，随着网络中恶意节点的存在，吞吐量增加，分组丢失增加。通过计算 SN 的信任值，可以将恶意节点从网络中剔除。考虑到 SN 的剩余能量和信任值，在网络中执行安全路由。此外，还使用了提供非对称密钥的 Rivest-Shamir-Adleman (RSA) 密码系统来保护数据传输。仿真结果表明，所提出的模型在高分组投递率方面具有有效性。
