Definition
Hardening is the process of securing a system by reducing its surface of vulnerability. It involves removing unnecessary software, accounts, and services, and configuring remaining components to minimize security risks. This proactive approach strengthens defenses against cyber threats by eliminating potential entry points. In practice, hardening involves implementing specific security controls and configurations tailored to the system's intended use. It is crucial for maintaining the integrity and confidentiality of data, as well as ensuring system availability and compliance with regulations. For instance, disabling unused ports on a network device is a common hardening technique. Unlike patching, which addresses known vulnerabilities, hardening focuses on minimizing the attack surface by default. This concept is fundamental to cybersecurity certifications like CompTIA Security+ and CySA+ and is a key consideration in secure system architecture.