From the doc: 'This is a Clipboard Exploit. When the user Views the site you have set-up, it will log everything that is present in there clipboard to a text file ('log.txt') on the same path/server where your PHP/HTML scripts are located with no user input AT ALL, meaning that the user doesn't have to do ANYTHING except view the website! You may ask, whats the use of this? But, you would be surprised how many people keep private details (passwords/bank details) on there clipboard because they are too lazy to type them out. The Log will display the date and time & when the user visited.'