Definition
Secure Software Requirements are specific, measurable, achievable, relevant, and time-bound criteria that define the security characteristics and controls a software system must possess. These requirements are integrated into the software development lifecycle, guiding design, coding, testing, and deployment to proactively build security into the application. They are crucial for mitigating vulnerabilities, protecting sensitive data, and ensuring compliance with industry regulations and organizational policies. For instance, a requirement might state that all user passwords must be hashed using a strong, industry-standard algorithm like Argon2. This differs from general functional requirements, which focus on what the software does, by specifically addressing how the software protects itself and its users. Understanding secure software requirements is vital for roles covered by certifications like CompTIA Security+ and CySA+.