On the WWW there are a few references e.g: http://www.innerx.net/personal/tsmith/futureHist.html http://aib.de/nsa/plusminus/spion.html http://www.heise.de/ct/Service/English.htm/99/04/174/ http://www-douzzer.ai.mit.edu:8080/conspiracy/privacy.html http://www.sltrib.com/1999/may/05081999/commenta/103876.htm http://www.spiegel.de/spiegel/nf/0,1518,14871,00.html http://www.itsecurity.com/views/v2.htm http://service.ecce-terram.de/zeit-archiv/1998/28/199828.spionage.neu_.html http://service.ecce-terram.de/zeit-archiv/daten/pages/199839.c_krypto_.html http://www2.zeit.de/zeit/print/199940.nsa_2_.html
I think Udo Ulfkotte http://www.ulfkotte.de treats the case in his book: 'Marktplatz der Diebe'.
Hope this helps
Johannes