Do not keep sensitive data (like passwords, creditcard numbers, PIN
etc.) in the clipboard while surfing the web. It is extremely easy to
extract the text stored in the clipboard to steal your sensitive
information.
Just try this:
1) Copy any text by ctrl+c
2) Click the Link:
http://www.friendlycanadian.com/applications/clipboard.htm
3) You will see the text you copied on the Screen which was
accessed by this web page.