## 4 Authentication in UAV Networks
### 6G Enabled Light Weight Authentication Protocols
paper, a mathematical method was devised to compute energy requirements in parallel with several security models and finally adopt the best possible protection strategy as per network security requirement and to minimize energy depletion. In this paper [107], an authentication mechanism based on a set of rules that includes an authenticated key exchange and digital signature is devised to cater to security requirements of transported data. Furthermore, a thorough security examination was conducted that concludes that in the industry 4.0 environment, the proposed authentication mechanism offers protection against various attacks. Additionally, the detailed verification in this study proves the higher ranking of the proposed scheme once compared with existing studies. Due to limitations in frequency band resources, proficient management of this limited asset and judicious sharing holds fundamental importance. One possible scheme to address all this is blockchain technology. The inherent advantages offered by blockchain technology makes it the best choice for the security of future networks and data exchange and the upcoming 6G communication model is no exception An efficient employment model of blockchain technology in 6G networks will result in better network resource management, effective network monitoring and efficient resource sharing. In the study [108], the inherent capabilities of blockchain technology are examined in connection with 6G network resource sharing and management, in view of different scenarios. The different applications and circumstances that are discussed in this study include network slicing, IoTs, blockchain ecosystems and D2D communication. Routinely, Internet of Things networked together employs a relatively weak model of security in use of the communication link. The communication is encrypted through the utilization of session keys. Moreover, in networked IoTs, the limitation of resource utilization is experienced which gives way to inefficient algorithms such as dynamic key generation. Secure interoperability and operation of IoT protocols is a significant issue in embedded devices with several resource limitations. This study offers a new scheme of dynamic key generation that is capable of functioning and producing a hefty number of keys that are unique. The suitability of such key generation algorithms is principally proven for Internet of Things modules and dependent conditions in which such devices cannot depend upon re-utilization of already in use keys for encryption and on unvarying key conciliation [109]. Light weight authentication in UAV systems is shown in Figure 14.  
Figure 14: Light weight authentication in UAV systems. This paper highlights the technicalities involved in the employment of BCT methods in conjunction with 6G networks. Moreover, the parallel working of IoT devices in blockchain enabled environment is presented in this study for smart convergence and distribution in industrial Internet of Things. Additionally, this paper describes the techniques, interesting challenging areas and potential research dimensions that may reveal technical horizons to pursue this research idea in an accelerated and right direction [110]. This paper presents a few fundamental characteristics of the 6G communication model. These include smart radio, artificial intelligence (AI), channel reliability and live edge computing. Moreover, some of popular technologies in each field in consultation with related privacy and security challenges are discussed. The report finally describes the potential use of 6G networks [111]. In this study, diverse blockchain implementation solutions were investigated to cater to future expected issues. At the outset, the role and task of DM team members in blockchain structural design is investigated and discusses the scalability schemes along with consensus algorithms. Subsequently, Access, Authentication, Authorization (AAA) requirements by DM members are discussed. Thirdly, blockchain models for mutual information processing are explained.