## 4 Authentication in UAV Networks
### 6G Enabled Light Weight Authentication Protocols
Academia-industry linkage is carrying out a widespread study on the employment of modern technology of machine learning (ML) in network of vehicles and mobility enabled devices. This research is revealing the possible ways for equipping 6G vehicular networks with much needed intelligence in future applications [118]. This paper [119], presents a survey on techniques related to vehicular networks in modernizing the ways they operate in a network enabled with due intelligence in the backdrop of machine learning technology. This article further elaborates on the utilization of this advanced technique in optimized networking, the security portion and information transportation in vehicular networks. Moreover, AI employment to achieve smart radios, intelligent learning and hands-on exploration in vehicular networks is an informative part of this study. This paper [120] suggests a network architecture sliced up into the communication and blockchain plane in relation to having an in-depth view of future blockchain enabled networks and related applications. A framework based on blockchain scheme is proposed that is capable to supervise the authority; moreover, the suggested model can administer the identity certificates of network elements. This proposed solution is named as \"Unified Identity Authentication Framework\". This paper [121], highlights the usefulness of blockchain while dealing with data security. This further elaborates the effectiveness of this technology referring to a report on indoor navigation systems. This study further describes an overall intelligent network model that can be achieved by appropriate employment of AI and blockchain together. Additionally, in this study, a number of open issues regarding information security in future 6G communication models are elaborated. In this paper [122], a number of major concerns and challenges regarding blockchain application in IoV are discussed. Multiple possible scenarios of IoV employment are also elaborated in this study. Additionally, this study explains further research dimensions in the field of IoV and offers details of possible opportunities for the modern world in the said field. IoV is discussed in paving the way towards an Intelligent Transportation System (ITS). In [123], three layered scheme which includes IoT device layer, trust centre at the edge layer and cloud layer are provided to add the security concern. The discussion of in this section in summarized in Table 3. \begin{table}
\begin{tabular}{c c c} \hline
**Ref.** & **Concept** & **Description** \\ \hline
[102] & (ROR) oracle model & Formal security assessment method for UAV security analysis. \\
[103] & Light-Edge & Three-layer scheme, including IoT device layer, trust center at the edge layer and cloud service providers. \\
[124] & SCNM-LSM & An artificial intelligence (AI)-based adaptive security specification method for 6G IoT networks. \\
[106] & Extended Kalman filtering & Predicts future harvesting power to calculate the required energy of different security strategies. \\
[107] & Privacy-preserving authentication & A digital signature and authenticated key exchange protocol resist several attacks in the industry 4.0 environment. \\
[108] & Integration of the blockchain in 6G & Blockchain for resource management and sharing in 6G \\
[109] & Key generation model & A novel dynamic key generation scheme that uses the entropy and performs various operations to continuously generate a large set of unique keys. \\ \hline \end{tabular}
\end{table} 
Table 3: 6G-Based Lightweight Authentication.