Checking if user has changed cookie value, manually

Question

I am busy with a login system for my project.

Just for an extra step to the security.. How can I check/detect if a user has manually changed a cookie value?

Is t

Answer 1

Add a second variable to your cookie, which is unique to the first value.

On Page_Load compare the two values to the database.

If they do not match a record, then delete the cookie.