Just in case you take the security offered by DES without question. This has just appeared on the Blair Broadcasting Corporation http://news.bbc.co.uk/hi/english/sci/tech/newsid_1645000/1645552.stm What I find most interesting is the apparent reaction of IBM Follow the link "Cracking Bank Encryption" and then look at the FAQ's. In particular "If this attack is so dangerous, why are you telling everyone?" Regards Chris Carr -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.