On Thu, 15 Aug 2002, David wrote: Moin, http://www-lehre.informatik.uni-osnabrueck.de/~aerpenbe/sec/book1.htm http://www.snailbook.com/index.html http://www-106.ibm.com/developerworks/library/l-keyc?t=gr,p=RSA-DSA www.google.de -> ssh ssl http://www.rz.uni-freiburg.de/pc/network/netsecure.html mfg Markus