# BBSF: Blockchain-Based Secure Weather Forecasting Information through Routing Protocol in Vanet
###### Abstract
For example, if there is bad weather, such as heavy rainfall or flooding, VANETs can inform nearby vehicles to decide to change their routes [6]. A set of rules known as routing protocols are utilized by routers to enable communication between the source and destination. Rather than physically moving the source's information to its destination, routers have the sole objective of updating the routing table  
Figure 1: Vehicular Ad Hoc Network Communication Architecture [4]. containing valuable data. Routing protocols serve various purposes, such as in selecting the most efficient path, preventing routing loops, enabling rapid convergence, reducing update traffic, being easy to configure, adapting to changes, scaling for large networks, being compatible with existing hosts and routers, and supporting variable lengths. In the proposed system, IPSec is employed to secure weather forecasting information in VANETs. IPSec is a suite of protocols standardized by the Internet Engineering Task Force (IETF). It operates across the IP network to authenticate, maintain data integrity, and ensure confidentiality between two communicating points. Additionally, it outlines the processes for encrypting, decrypting, and authenticating packets [7]. The main idea is to provide secure weather forecasting information among all the trustful smart vehicles. In our approach, the main content delivery is to provide security in terms of weather data. In VANETs, the best possible vehicle route is also necessary, similar to other security parameters, including security, privacy, and accuracy. Good weather is also a factor that compels a vehicle to follow an appropriate route. Weather forecasting between the V2V and V2I is needed to notify the vehicle about which suitable route would be good to travel on. We designed secure weather forecasting information flow to secure V2V and V2I communication. Inside the VANET, the secure and reliable transmission delivery of the contents is applied. The delivery should be efficient and reliable through security parameters such as trusted nodes evaluation, nodes transmission rate, and encrypted weather forecasting information; the advantages of the mobility of the VANET support the efficient delivery of content management. We proposed an efficient, secure routing protocol to minimize the weather content request and delivery delay. The vehicles are smart enough to provide secure routing and content placement for content reliability. Reliability is one of the most important content placement and management ingredients. The routing enables us to deliver the contents to the right node with secure transmission. We have less infrastructure involvement and use distributed environments and secure content delivery. Smart vehicles/devices are equipped with more advanced communication capabilities, such as GPS, sensors, and processing power, which enable them to collect and process weather data about the environment and other vehicles. These devices can analyze the weather data and make decisions based on the analysis. Smart devices can also communicate with other devices and the infrastructure to exchange information and coordinate actions. Examples of smart devices in VANETs include vehicles, RSUs, and sensors. On the other hand, dumb devices have limited communication capabilities and cannot process weather data or make decisions independently. These devices rely on infrastructure and smart devices to provide information and make decisions. Examples of dumb devices in VANETs include traffic lights, road signs, and cameras. Smart devices have access to various types of data and sensors that dumb devices do not have access to. For instance, in the case of weather forecasting in VANETs, smart devices can collect real-time data on temperature, humidity, air pressure, wind speed, and precipitation. These devices can also use GPS sensors to collect location data, which is critical in predicting weather conditions accurately.