1. A method for performing security-focused web crawling by a server, comprising: identifying sensitive data on a first web page; generating a first document object model (DOM) for the first web page that represents the sensitive data on the first web page; comparing one or more attributes of the sensitive data in the first DOM with the one or more attributes of sensitive data in a second DOM for a second web page; and determining whether the first web page is different from the second web page based on the comparison of the one or more attributes of the sensitive data in the first DOM and the second DOM.