Techniques are provided through which a user is verified as authorized to modify a website. A web crawler generates a filename and content for the user, who purports to be authorized to modify a particular website. The web crawler sends the filename and content toward the user. The user stores a file with the filename on a server that hosts the website. The user places the content within the file. The web crawler determines whether the file is stored on the server and whether the content is in the file. If so, then the web crawler stores information that indicates that the user is authorized to receive information pertaining to the website, which may be confidential information. If the file is not stored on the server or if the file does not contain the content, then the web crawler does not provide any information to the user pertaining to the website.