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CompTIA Security+ · CompTIA
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As it pertains to this Scenario Application: -Removing Special Characters: The use of regular expressions to strip special characters from form variables is a method of input validation. By removing potentially dangerous characters, the application minimizes the risk of executing unintended commands or code. -Security Enhancement: Input validation helps ensure that only expected and safe input is processed, thereby protecting the application from malicious attacks that exploit unvalidated input. The policy directly describes a practice used to validate and sanitize user input, which is the essence of input validation. This technique is crucial for maintaining the security of web applications by preventing injection-based attacks.
Input validation is the process of analyzing inputs and disallowing those which are considered unsuitable. Ie: Only allowing accepted inputs based on specific criteria