Applications are the interface between users and systems, and increasingly the primary target for attackers. Unlike infrastructure, which is typically hardened and standardized, applications vary widely in design, coding practices, and security awareness. This variability makes them one of the weakest links in modern IT. Application security refers to the processes, tools, and practices used to secure applications throughout their lifecycle, from initial design to decommissioning.
The shift to web-based, cloud-hosted, and mobile applications has expanded the attack surface dramatically. Attackers now target vulnerabilities such as injection flaws, authentication weaknesses, and misconfigured APIs to compromise systems. At the same time, the rise of continuous deployment and agile development cycles means that new code is released frequently, raising the stakes for proactive security. Protecting applications is not just about adding defenses after deployment; it requires embedding security into every phase of development and operations, ensuring that vulnerabilities are minimized before they can be exploited.