Preventing unauthorized software patches is critical for maintaining system integrity and security. The most common protection methods include implementing strict access controls to ensure only authorized personnel can apply patches. Organizations should utilize code signing and digital signatures to verify patch authenticity before installation. Establishing secure communication channels like HTTPS or VPNs for patch distribution prevents interception and tampering. Regular integrity checks using hash verification techniques help detect unauthorized modifications. Network segmentation limits potential damage by containing patch applications to specific zones. Comprehensive logging and monitoring systems provide real-time detection of unauthorized patch attempts. Employee training on security protocols reduces human error risks. Maintaining an updated inventory of all software assets enables better patch management. These layered security measures create a robust defense against malicious software modifications while ensuring only validated updates are installed.