The article was published in the
current issue (17/2005) of the german language IT magazine called C't.
Apparently they offer an online service to download individual articles. They should become available after some weeks on a pay per view base at
http://www.heise.de/kiosk/archiv/ct/2005/17
This link will only work once the article is released for online use. In the meanwhile you should be able to get a copy of the magazine at a german newspaper stand.