# A Bibliometric Analysis and Visualization of In-Vehicle Communication Protocols
## 4 Discussion  
The co-citation analysis reveals the scholarly context of the field, particularly emphasizing the area of cybersecurity related to vehicles, networks, and wireless communications. [PERSON], [PERSON], [PERSON], and [PERSON] emerge as leading contributors, exuding strong influence as critical hubs in the citation matrix by receiving numerous citations combined with high link values. To illustrate, [PERSON] dominates the domain with 9640 citations and 940 co-citation links, which showcase his crowned influence in the scholarly network, facing an ever-increasing need for novel insights. These authors focus on intrusion detection systems IDS, VANETs, and intelligent transportation security, which are border challenges in the smart mobility era. The co-citation network is representative of active partnerships among researchers dealing with the technical and applied dimensions of connected vehicles, from machine learning-based threat detection to cryptographic techniques for CAN (Controller Area Network) [31]. Further analysis shows clusters centered around data privacy, in-vehicle communication security, and real-time vehicular network analytics domains. Notably, newer contributors such as [PERSON] and [PERSON] also show strong co-citation links, suggesting authoritative influence within the area. The blend of well-established experts alongside relatively new contributors indicates that not only is the field mature but also that it is highly versatile, fostering innovative behavior and interdisciplinary exploration. This study of co-cited journals and conferences shows that the impact clusters of research are distributed among security and vehicle technology publications. Journals such as Ad Hoc _Networks_ and their derivatives appear repeatedly and vigorously. For example, the journal \"Ad Hoc Networks\" alone has over 120 citations and over 3400 link strengths in its most cited version. This citation count marks it as the central journal for wireless vehicular communication system-related publications. Likewise, _ACM Computing Surveys_ and _Accident Analysis & Prevention_ serve as a theoretical base and practical safety concern regarding connected vehicles. The latter journal strengthens the trend towards risk mitigation with a normalized citation of 129 and 1939 total link strength, placing cybersecurity not only as a technical issue but as a public safety danger [32]. They act as linkages across automotive engineering, network science, and computer security and serve as interdisciplinary collaboration centers. This varies across publication channels and fosters effective diffusion of knowledge to augment scholarly participation in vehicle interconnectivity's practical and theoretical aspects. The analysis conducted at the country level synthesizes data at different scales. It reveals that the research on connected vehicle systems and their cybersecurity has a high level of globalization and, at the same time, is concentrated in the more economically developed areas. China provides adequate documents (\(n=8746\)). Well-known publications such as \"A Practical Wireless Attack on the Connected Car\" elucidate the former by \begin{table}
\begin{tabular}{l l l} \hline \hline
**Journal/Conference** & **Subject** & **Number of Citations** \\ \hline _IEEE Transactions on Vehicular Technology_ & Vehicular Technology & 4175 \\ _IEEE Access_ & General Engineering/Technology & 2664 \\ _IEEE Transactions on Intelligent Transportation Systems_ & Intelligent Transportation & 2628 \\ _Sensors_ & Sensor Technology & 1132 \\ _Vehicular Communications_ & Vehicular Communications & 809 \\ _IEEE Internet of Things Journal_ & Internet of Things (IoT) & 679 \\ _IEEE Communications Surveys and Tutorials_ & Communications/Surveys & 474 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Top core journals. analyzing various weaknesses in the vehicle's in-vehicle network (IVN) and suggesting pragmatic security solutions.