Which method is considered most secure for sending data via a form?

Using the POST method for sending data via a form is considered the most secure option primarily because of how it handles data transmission. When you use the POST method, the form data is included in the body of the HTTP request, rather than in the URL. This means that sensitive information such as passwords or personal identification information is not exposed in the URL, which can be logged in server logs, browser history, or even visible to anyone monitoring network traffic.

Moreover, data sent via POST can be larger than data sent using the GET method, as POST does not have the limitations on the amount of data being sent, making it suitable for sending large forms or files. Another advantage is that POST allows for more complex data structures, such as JSON or XML, which are often required for modern web applications.

While other methods like GET can also be secure when used over HTTPS, they are still less suitable for handling sensitive information due to their inherent visibility in the URL. The distinct handling of data by POST, along with its privacy and capacity features, solidifies its standing as the most secure method for sending data via forms in web applications.