With the development of the digital economy, the network security issues of connected vehicles have increasingly garnered widespread attention. Particularly, the growing prevalence of attacks on keyless entry systems poses not only significant challenges to vehicle security but also stimulates in-depth research within the field of security. However, despite the extensive research on the attack and defense issues of keyless entry systems, there is currently a lack of a systematic review that comprehensively summarizes the research status and achievements in this domain. Therefore, this paper aims to fill this gap by providing a comprehensive overview of attack and defense technologies for keyless entry systems in automotive vehicles. Through a meticulous review of abundant literature, this paper delves into various known security attack methods, providing detailed analyses of the principles and impacts of these attack techniques. Simultaneously, the paper consolidates the latest research progress in countering these attacks, systematically summarizing the strengths and weaknesses of various defense technologies and their application scenarios. By gaining insightful insights into the current research landscape, the paper also discusses future trends in preventing keyless entry system-related attacks, providing guidance for researchers in future work.