EnterpriseSSL is compatible with any browsers and webservers using SSL version 3 - the de facto SSL implementation. SSL version 1 and version 2 have been superseded by version 3 for a number of years, due to the security flaws found in these old versions.
All web browsers
developed after Internet Explorer 3 use SSL version 3 (however
still support older SSL protocol versions). If your webserver is only
capable of supporting versions 1 and 2 of the SSL protocol, we recommend you contact your webserver software vendor for an update - these
protocols are flawed. For more details on why SSL version 2 is no longer
used can be found here:
http://www.eucybervote.org/Reports/MSI-WP2-D7V1-V1.0-02.htm