React Native security is a critical aspect of building cross-platform mobile apps that interact with remote servers, as it involves protecting user data and preventing common web vulnerabilities such as cross-site scripting (XSS). To secure data transfer, developers can use certificate pinning libraries like react-native-ssl-pinning or react-native-cert-pinner to prevent man-in-the-middle attacks. Authentication protocols like OAuth 2.0 are also essential for establishing trust between the client app and the resource server. Additionally, dependency vulnerabilities can be detected using tools like Snyk, which scans open-source packages for security issues and provides recommendations for fixing them. By implementing these security measures, developers can build more secure React Native apps that protect user data and prevent common web vulnerabilities.