Forgive me for being slightly off topic here. My company has several sites and applications that require authentication by digital certificate. We'd like to wrap it all up into a portal site for single point of access and make it single sign on. I was wondering if anyone on the list could point me to a good source of info on certificate based single sign on solutions, preferably based on openssl and some sort of ldap x.500 system? I'd like to have people come in to the portal site over https, authenticate with a digital certificate and then be able to access other secure sites using the same certificate _without being asked again for the certificate_. Thanks in advance for any help. Derek Charles. _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]