# Information Fusion in Autonomous Vehicle Using Artificial Neural Group Key Synchronization
## 3 Proposed Methodology  
This paper proposes an area-based key sharing system for cars and RSUs in this part, with pre-estimated and previously shared key pair pools. The temporary keys are updated in this system depending on the positions of the vehicles rather than the time frame. Interim keys (ATs) are previously-shared keys that are distributed to vehicles and RSUs for a limited period (e.g., 24 h). When a vehicle moves to a new region, the interim keys are updated to reflect the new location. Updated key requests may be disregarded as long as the cars are in regions with previously shared keys. Keys will be updated during non-peak hours (e.g., midnight) for use in the upcoming time frame. The use of a smart route prediction system can aid in the assumptions of areas through which one vehicle may traverse to access additional key sharing. The researchers of [10] proposed the CVTPM, which uses complex integers for all control factors. It is unclear if the CVTPM can resist a majority threat because they only looked at the geometric threat. A VVTPM system has been proposed by [PERSON] et al. [12]. This approach, however, does not really provide an accurate synchronization assessment. [PERSON] et al. [13] suggested putting TPM structure on an FPGA to conduct key exchange by mutual training of these machines. The proposed architecture's original concept is to share keys depending on the location of a single car rather than predetermined time intervals. The key pairs used for V2X transmission are modified based on the position information of the vehicle. Here's an instance: Assuming the V2X transmission system is set up in a broad region with a single key sharing center, several RSUs, and a huge number of vehicles. To begin, this region is divided into \(N\) zones, each of which corresponds to \(N\) types of secret key stores. RSUs are classified into regions depending on their location. The RSUs are then assigned key sets that correspond to their region. After that, \(R\) sets of keys (key sets ranging from \(1\sim R\)) are previously-shared to one car, with proper identification confirmed. This part, seen in Figure 4, is known as pre-stage, and it is carried out at the start of each effective time frame (e.g., 24 h). If a vehicle remains in region \(X\) and \(X\) corresponds to \(1\sim R\), the key sequences \(X\)can be used for V2X transmission. As a consequence, as soon as one car stays inside one region with previously-shared keys, no need to change keys inside a permissible time frame. When a vehicle reaches a zone without having received previously-shared keys, a request for related keys will be made to PKI servers via RSUs, just as the current V2X PKI network. As a result, by lowering the number of requests for key updates, the average key sharing delay may be decreased. In the first stage of this network, the very first step is to share the keys. A cellular-based transmission network should be used since this phase necessitates data transmission between vehicles/RSUs and PKI servers. As previously said, one suitable time period is 24 h, and the previously-mentioned sharing step should occur at a non-rush hours, such as late at night. While the keys from the previous time session will still be in effect, the pre-stage in Figure 4 can be configured for one hour. RSUs will get fresh keys and relevant data via internet connections at this pre-stage. The majority of vehicles on the streets at present moment are unable to download new keys with previous-authentication using cellphone-based internet networks such as LTE or 5G connections. Meanwhile, there will still be automobiles on the roads that use the old keys to connect. Once the pre-stage is complete, the cars will rely on the currently requested keys as a backup mechanism until they can establish a robust link with the PKI server through mobile communication. If a vehicle arrives in a region without previously shared keys, it will seek ATs as a complement to the key sharing mechanism.