Worked on the NordSecurity/libtelio repository to enhance the security of VPN configuration token handling, focusing on in-memory data protection. Developed and implemented a method in Rust to zeroize authentication tokens after their final use, ensuring that sensitive data is cleared from memory when the NordVpnLiteConfig instance is dropped. This approach reduced the risk of token leakage and improved the runtime security posture of the system. The work demonstrated a strong application of security best practices and system programming principles, delivering a robust pattern for secure memory handling and contributing to clearer defense-in-depth strategies within the codebase.