A Trusted MANET Routing Algorithm Based on Fuzzy Logic. MANET wireless network changes network topology continuously and dynamically due to the absence of infrastructure and central control. Typically, this network used for areas where unavailable basic communications services such as battlefield, emergency relief, and virtual classes. However, ad hoc networks exposed to different attacks as in malicious or selfish nodes that impede packets delivery. A new algorithm proposed of the MANET using a fuzzy logic system to solve malicious nodes problem. The routing algorithm relies on two main principles as trust level and shortest path (hops count). The finding obtained from three key parameters as high packet delivery fraction with low endtoend delay and normalized routing load in this study. These results calculated based on the comparison between the FLTS algorithm with AODV protocol and without a drop.

BlockchainBased Lightweight Trust Management in Mobile AdHoc Networks As a trending and interesting research topic, in recent years, researchers have been adopting the blockchain in the wireless adhoc environment. Owing to its strong characteristics, such as consensus, immutability, finality, and provenance, the blockchain is utilized not only as a secure data storage for critical data but also as a platform that facilitates the trustless exchange of data between independent parties. However, the main challenge of blockchain application in an adhoc network is which kind of nodes should be involved in the validation process and how to adopt the heavy computational complexity of block validation appropriately while maintaining the genuine characteristics of a blockchain. In this paper, we propose the blockchainbased trust management system with a lightweight consensus algorithm in a mobile adhoc network (MANET). The proposed scheme provides the distributed trust framework for routing nodes in MANETs that is tamperproof via blockchain. The optimized link state routing protocol (OLSR) is exploited as a representative protocol to embed the blockchain concept in MANETs. As a securely distributed and trusted platform, blockchain solves most of the security issues in the OLSR, in which every node is performing the security operation individually and in a repetitive manner. Additionally, using predefined principles, the routing nodes in the proposed scheme can collaborate to defend themselves from the attackers in the network. The experimental results show that the proposed consensus algorithm is suitable to be used in the resourcehungry MANET with reduced validation time and less overhead. Meanwhile, the attack detection overhead and time also decrease because the repetitivity of the process is reduced while providing a scalable and distributed trust among the routing nodes.