This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Or are you talking about using certificates in the context of WS-Security? Then you'd be looking at using a package like WSS4J, and the outline of what to do would be something like this. [ March 21, 2006: Message edited by: Ulf Dittmer ]