Denial of service (DoS) security attacks are intended to compromise a system's _______.

Denial of Service (DoS) attacks specifically aim to compromise a system's availability. The primary goal of such attacks is to make a system or service unavailable to its intended users by overwhelming it with a flood of illegitimate requests or by exploiting vulnerabilities to crash the system. When a service becomes unavailable, legitimate users cannot access it, which disrupts normal operations and can lead to significant downtime and loss of functionality. This focus on preventing legitimate access underscores the importance of availability in the context of network security.

In contrast, confidentiality refers to protecting information from unauthorized access, integrity ensures that data remains unaltered and trustworthy, and authenticity verifies the identity of users and systems. While DoS attacks may indirectly affect these elements by disrupting trust in services, their main intent is to hinder availability.