What happens with Secure Documents (SSL, https:)?
If you enter a “Secure Document Area,” cookies and other header information such as User Agent and Referer are sent encrypted, so they cannot be filtered. We recommend getting your browser to alert you when this happens. (On Netscape: Options; Security; General; Show an alert before entering a secure document space.) We also recommend adding the line :443 to the blockfile to stop all but sites specified in an exception after that line from using SSL. It may be possible to filter encrypted cookies by combining the blocking proxy with a cryptographic proxy along the lines of SafePassage, but we have not tried this.
