A developer is building a new web application with a user registration form. To prevent attackers from submitting malicious scripts or SQL commands through the form fields, which of the following security techniques should be prioritized for implementation on the server-side?
Static code analysis
Implementation of least privilege in code execution
Input validation is the process of ensuring that a program operates on clean, correct, and useful data. It uses rules to check for data correctness, meaningfulness, and security before the data is processed by the application. This technique is a primary defense against a wide range of data manipulation attacks, such as SQL injection, buffer overflows, and cross-site scripting (XSS), which often originate from user-submitted data. The other options are also important for application security but serve different functions. Static code analysis finds vulnerabilities in source code before runtime, secure cookie implementation protects session data, and the principle of least privilege limits the potential damage from an exploit rather than preventing the initial input-based attack.
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