Which protection method focuses on detecting malicious behavior in real-time?

The concept of runtime protection revolves around monitoring the behavior of applications and processes while they are executing. This method is specifically designed to identify malicious actions as they occur in real-time, offering immediate responses to threats that may not be detectable through traditional signature-based methods. By focusing on the behavior of running processes, runtime protection can uncover new and evolving threats that might leverage legitimate application functionality to perform malicious activities.

In contrast, the other options aim at different aspects of security. Live protection generally refers to ongoing virus and malware scanning, which may not provide the same level of immediate response to behavioral threats. Device isolation focuses on preventing communication with potentially harmful devices or networks, which is a preventive measure rather than a detection method. Peripheral control involves managing and controlling access to external devices like USB drives to mitigate data leakage or malware introduction, but it does not address real-time behavior analysis. Hence, runtime protection stands out as the most relevant method for detecting malicious behavior in real-time.