MANET is a collection of mobile nodes that communicate through wireless networks as they move from one point to another. MANET is an infrastructure-less network with a changeable topology; as a result, it is very susceptible to attacks. MANET attack prevention represents a serious difficulty. Malicious network nodes are the source of network-based attacks. In a MANET, attacks can take various forms, and each one alters the network's operation in its unique way. In general, attacks can be separated into two categories: those that target the data traffic on a network and those that target the control traffic. This article explains the many sorts of assaults, their impact on MANET, and the MANET-based defence measures that are currently in place. The suggested SRA that employs blockchain technology (SRABC) protects MANET from attacks and authenticates nodes. The secure routing algorithm (SRA) proposed by blockchain technology safeguards control and data flow against threats. This is achieved by generating a Hash Function for every transaction. We will begin by discussing the security of the MANET. This article's second section explores the role of blockchain in MANET security. In the third section, the SRA is described in connection with blockchain. In the fourth phase, PDR and Throughput are utilised to conduct an SRA review using Blockchain employing PDR and Throughput. The results suggest that the proposed technique enhances MANET security while concurrently decreasing delay. The performance of the proposed technique is analysed and compared to the routing protocols Q-AODV and DSR.

翻译：MANET（移动自组织网络）是由移动节点组成的集合，这些节点在移动过程中通过无线网络进行通信。MANET是一种无基础设施网络，拓扑结构动态可变，因此极易受到攻击。MANET攻击预防是一个严峻的挑战。恶意网络节点是网络攻击的源头。在MANET中，攻击形式多样，每种攻击都以独特方式改变网络运行状态。总体而言，攻击可分为两类：针对网络数据流量的攻击和针对控制流量的攻击。本文阐述了多种攻击类型及其对MANET的影响，并介绍了当前基于MANET的防御措施。所提出的采用区块链技术的安全路由算法（SRABC）能够保护MANET免受攻击并对节点进行身份验证。该区块链技术提出的安全路由算法（SRA）可保护控制流和数据流免遭威胁，其实现方式是为每笔交易生成一个哈希函数。我们首先讨论MANET的安全性，本文第二部分探讨区块链在MANET安全中的作用，第三部分阐述与区块链相关的SRA，第四阶段利用分组交付率（PDR）和吞吐量对基于区块链的SRA进行性能评估。结果表明，所提技术在增强MANET安全性的同时降低了延迟。本文将该技术的性能与Q-AODV和DSR路由协议进行了分析比较。