Input Validation: The Key to Secure Applications

Input validation is the process of checking user input to ensure that it is valid and does not contain any malicious code. It is an essential security measure that can help to prevent a variety of attacks, such as cross-site scripting (XSS) and SQL injection. There are a number of different ways to perform input validation. Some of the most common methods include: Data type validation: This involves checking that the input data is of the correct type.